diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 75231110..39793c03 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -1,5 +1,4 @@
 # This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
 
 name: develop
 
@@ -16,12 +15,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9, "3.10", pypy3]
+        python-version: [3.7, 3.8, 3.9, '3.10', '3.11', pypy-3.8, pypy-3.9]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
diff --git a/Makefile b/Makefile
index c0f9cf0e..fe4a238c 100644
--- a/Makefile
+++ b/Makefile
@@ -43,5 +43,7 @@ install:
 	$(SETUP) install --user --prefix=
 
 release:
-	zenity --question
-	$(SETUP) sdist bdist_wheel upload --sign
+	#zenity --question
+	$(SETUP) sdist bdist_wheel
+	echo 'Upload new version to PyPI using:'
+	echo '	twine upload --sign dist/you-get-VERSION.tar.gz dist/you_get-VERSION-py3-none-any.whl'
diff --git a/README.md b/README.md
index d2fdaa99..44c102cd 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,9 @@
 [![PyPI version](https://img.shields.io/pypi/v/you-get.svg)](https://pypi.python.org/pypi/you-get/)
 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/soimort/you-get?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-**NOTICE: Read [this](https://github.com/soimort/you-get/blob/develop/CONTRIBUTING.md) if you are looking for the conventional "Issues" tab.**
+**NOTICE (30 May 2022): Support for Python 3.5, 3.6 and 3.7 will eventually be dropped. ([see details here](https://github.com/soimort/you-get/wiki/TLS-1.3-post-handshake-authentication-(PHA)))**
+
+**NOTICE (8 Mar 2019): Read [this](https://github.com/soimort/you-get/blob/develop/CONTRIBUTING.md) if you are looking for the conventional "Issues" tab.**
 
 ---
 
@@ -53,9 +55,9 @@ Are you a Python programmer? Then check out [the source](https://github.com/soim
 
 ### Prerequisites
 
-The following dependencies are necessary:
+The following dependencies are recommended:
 
-* **[Python](https://www.python.org/downloads/)**  3.2 or above
+* **[Python](https://www.python.org/downloads/)**  3.7.4 or above
 * **[FFmpeg](https://www.ffmpeg.org/)** 1.0 or above
 * (Optional) [RTMPDump](https://rtmpdump.mplayerhq.hu/)
 
@@ -89,6 +91,14 @@ $ python3 setup.py install --user
 
 to install `you-get` to a permanent path.
 
+You can also use the [pipenv](https://pipenv.pypa.io/en/latest) to install the `you-get` in the Python virtual environment.
+
+```
+$ pipenv install -e .
+$ pipenv run you-get --version
+you-get: version 0.4.1555, a tiny downloader that scrapes the web.
+```
+
 ### Option 4: Git clone
 
 This is the recommended way for all developers, even if you don't often code in Python.
diff --git a/README.rst b/README.rst
index 3c23ab5e..376abcf7 100644
--- a/README.rst
+++ b/README.rst
@@ -52,7 +52,7 @@ source <https://github.com/soimort/you-get>`__ and fork it!
 
 .. |PyPI version| image:: https://badge.fury.io/py/you-get.png
    :target: http://badge.fury.io/py/you-get
-.. |Build Status| image:: https://api.travis-ci.org/soimort/you-get.png
-   :target: https://travis-ci.org/soimort/you-get
+.. |Build Status| image:: https://github.com/soimort/you-get/workflows/develop/badge.svg
+   :target: https://github.com/soimort/you-get/actions
 .. |Gitter| image:: https://badges.gitter.im/Join%20Chat.svg
    :target: https://gitter.im/soimort/you-get?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
diff --git a/src/you_get/common.py b/src/you_get/common.py
index 473c3155..4095dc52 100755
--- a/src/you_get/common.py
+++ b/src/you_get/common.py
@@ -138,13 +138,14 @@ auto_rename = False
 insecure = False
 m3u8 = False
 postfix = False
+prefix = None
 
 fake_headers = {
-    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',  # noqa
+    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
     'Accept-Charset': 'UTF-8,*;q=0.5',
     'Accept-Encoding': 'gzip,deflate,sdch',
     'Accept-Language': 'en-US,en;q=0.8',
-    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.74 Safari/537.36 Edg/79.0.309.43',  # noqa
+    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 Edg/115.0.1901.183'  # Latest Edge
 }
 
 if sys.stdout.isatty():
@@ -342,10 +343,37 @@ def undeflate(data):
     return decompressobj.decompress(data)+decompressobj.flush()
 
 
+# an http.client implementation of get_content()
+# because urllib does not support "Connection: keep-alive"
+def getHttps(host, url, headers, debuglevel=0):
+    import http.client
+
+    conn = http.client.HTTPSConnection(host)
+    conn.set_debuglevel(debuglevel)
+    conn.request("GET", url, headers=headers)
+    resp = conn.getresponse()
+    set_cookie = resp.getheader('set-cookie')
+
+    data = resp.read()
+    try:
+        data = ungzip(data)  # gzip
+        data = undeflate(data)  # deflate
+    except:
+        pass
+
+    conn.close()
+    return str(data, encoding='utf-8'), set_cookie
+
+
 # DEPRECATED in favor of get_content()
 def get_response(url, faker=False):
     logging.debug('get_response: %s' % url)
-
+    ctx = None
+    if insecure:
+        # ignore ssl errors
+        ctx = ssl.create_default_context()
+        ctx.check_hostname = False
+        ctx.verify_mode = ssl.CERT_NONE
     # install cookies
     if cookies:
         opener = request.build_opener(request.HTTPCookieProcessor(cookies))
@@ -353,10 +381,10 @@ def get_response(url, faker=False):
 
     if faker:
         response = request.urlopen(
-            request.Request(url, headers=fake_headers), None
+            request.Request(url, headers=fake_headers), None, context=ctx,
         )
     else:
-        response = request.urlopen(url)
+        response = request.urlopen(url, context=ctx)
 
     data = response.read()
     if response.info().get('Content-Encoding') == 'gzip':
@@ -987,6 +1015,8 @@ def download_urls(
     title = tr(get_filename(title))
     if postfix and 'vid' in kwargs:
         title = "%s [%s]" % (title, kwargs['vid'])
+    if prefix is not None:
+        title = "[%s] %s" % (prefix, title)
     output_filename = get_output_filename(urls, title, ext, output_dir, merge)
     output_filepath = os.path.join(output_dir, output_filename)
 
@@ -1536,9 +1566,13 @@ def script_main(download, download_playlist, **kwargs):
         help='Do not download captions (subtitles, lyrics, danmaku, ...)'
     )
     download_grp.add_argument(
-        '--postfix', action='store_true', default=False,
+        '--post', '--postfix', dest='postfix', action='store_true', default=False,
         help='Postfix downloaded files with unique identifiers'
     )
+    download_grp.add_argument(
+        '--pre', '--prefix', dest='prefix', metavar='PREFIX', default=None,
+        help='Prefix downloaded files with string'
+    )
     download_grp.add_argument(
         '-f', '--force', action='store_true', default=False,
         help='Force overwriting existing files'
@@ -1632,7 +1666,7 @@ def script_main(download, download_playlist, **kwargs):
     download_grp.add_argument('--itag', help=argparse.SUPPRESS)
 
     download_grp.add_argument('-m', '--m3u8', action='store_true', default=False,
-        help = 'download vide using an m3u8 url')
+        help = 'download video using an m3u8 url')
 
 
     parser.add_argument('URL', nargs='*', help=argparse.SUPPRESS)
@@ -1662,6 +1696,7 @@ def script_main(download, download_playlist, **kwargs):
     global insecure
     global m3u8
     global postfix
+    global prefix
     output_filename = args.output_filename
     extractor_proxy = args.extractor_proxy
 
@@ -1699,6 +1734,7 @@ def script_main(download, download_playlist, **kwargs):
         insecure = True
 
     postfix = args.postfix
+    prefix = args.prefix
 
     if args.no_proxy:
         set_http_proxy('')
@@ -1785,20 +1821,10 @@ def google_search(url):
     url = 'https://www.google.com/search?tbm=vid&q=%s' % parse.quote(keywords)
     page = get_content(url, headers=fake_headers)
     videos = re.findall(
-        r'<a href="(https?://[^"]+)" onmousedown="[^"]+"><h3 class="[^"]*">([^<]+)<', page
+        r'(https://www\.youtube\.com/watch\?v=[\w-]+)', page
     )
-    vdurs = re.findall(r'<span class="vdur[^"]*">([^<]+)<', page)
-    durs = [r1(r'(\d+:\d+)', unescape_html(dur)) for dur in vdurs]
-    print('Google Videos search:')
-    for v in zip(videos, durs):
-        print('- video:  {} [{}]'.format(
-            unescape_html(v[0][1]),
-            v[1] if v[1] else '?'
-        ))
-        print('# you-get %s' % log.sprint(v[0][0], log.UNDERLINE))
-        print()
     print('Best matched result:')
-    return(videos[0][0])
+    return(videos[0])
 
 
 def url_to_module(url):
diff --git a/src/you_get/extractors/bilibili.py b/src/you_get/extractors/bilibili.py
index 49334d5b..6335e6dd 100644
--- a/src/you_get/extractors/bilibili.py
+++ b/src/you_get/extractors/bilibili.py
@@ -12,8 +12,12 @@ class Bilibili(VideoExtractor):
 
     # Bilibili media encoding options, in descending quality order.
     stream_types = [
-        {'id': 'hdflv2', 'quality': 125, 'audio_quality': 30280,
-         'container': 'FLV', 'video_resolution': '3840p', 'desc': '真彩 HDR'},
+        {'id': 'hdflv2_8k', 'quality': 127, 'audio_quality': 30280,
+         'container': 'FLV', 'video_resolution': '4320p', 'desc': '超高清 8K'},
+        {'id': 'hdflv2_dolby', 'quality': 126, 'audio_quality': 30280,
+         'container': 'FLV', 'video_resolution': '3840p', 'desc': '杜比视界'},
+        {'id': 'hdflv2_hdr', 'quality': 125, 'audio_quality': 30280,
+         'container': 'FLV', 'video_resolution': '2160p', 'desc': '真彩 HDR'},
         {'id': 'hdflv2_4k', 'quality': 120, 'audio_quality': 30280,
          'container': 'FLV', 'video_resolution': '2160p', 'desc': '超清 4K'},
         {'id': 'flv_p60', 'quality': 116, 'audio_quality': 30280,
@@ -38,6 +42,8 @@ class Bilibili(VideoExtractor):
         {'id': 'jpg', 'quality': 0},
     ]
 
+    codecids = {7: 'AVC', 12: 'HEVC', 13: 'AV1'}
+
     @staticmethod
     def height_to_quality(height, qn):
         if height <= 360 and qn <= 16:
@@ -66,7 +72,7 @@ class Bilibili(VideoExtractor):
 
     @staticmethod
     def bilibili_api(avid, cid, qn=0):
-        return 'https://api.bilibili.com/x/player/playurl?avid=%s&cid=%s&qn=%s&type=&otype=json&fnver=0&fnval=16&fourk=1' % (avid, cid, qn)
+        return 'https://api.bilibili.com/x/player/playurl?avid=%s&cid=%s&qn=%s&type=&otype=json&fnver=0&fnval=4048&fourk=1' % (avid, cid, qn)
 
     @staticmethod
     def bilibili_audio_api(sid):
@@ -112,6 +118,10 @@ class Bilibili(VideoExtractor):
     def bilibili_space_channel_api(mid, cid, pn=1, ps=100):
         return 'https://api.bilibili.com/x/space/channel/video?mid=%s&cid=%s&pn=%s&ps=%s&order=0&jsonp=jsonp' % (mid, cid, pn, ps)
 
+    @staticmethod
+    def bilibili_space_collection_api(mid, cid, pn=1, ps=30):
+        return 'https://api.bilibili.com/x/polymer/space/seasons_archives_list?mid=%s&season_id=%s&sort_reverse=false&page_num=%s&page_size=%s' % (mid, cid, pn, ps)
+
     @staticmethod
     def bilibili_series_archives_api(mid, sid, pn=1, ps=100):
         return 'https://api.bilibili.com/x/series/archives?mid=%s&series_id=%s&pn=%s&ps=%s&only_normal=true&sort=asc&jsonp=jsonp' % (mid, sid, pn, ps)
@@ -141,6 +151,8 @@ class Bilibili(VideoExtractor):
 
     def prepare(self, **kwargs):
         self.stream_qualities = {s['quality']: s for s in self.stream_types}
+        self.streams.clear()
+        self.dash_streams.clear()
 
         try:
             html_content = get_content(self.url, headers=self.bilibili_headers(referer=self.url))
@@ -171,6 +183,11 @@ class Bilibili(VideoExtractor):
             self.url = 'https://www.bilibili.com/%s' % match1(self.url, r'/s/(.+)')
             html_content = get_content(self.url, headers=self.bilibili_headers())
 
+        # redirect: festival
+        elif re.match(r'https?://(www\.)?bilibili\.com/festival/(.+)', self.url):
+            self.url = 'https://www.bilibili.com/video/%s' % match1(self.url, r'bvid=([^&]+)')
+            html_content = get_content(self.url, headers=self.bilibili_headers())
+
         # sort it out
         if re.match(r'https?://(www\.)?bilibili\.com/audio/au(\d+)', self.url):
             sort = 'audio'
@@ -182,7 +199,7 @@ class Bilibili(VideoExtractor):
             sort = 'live'
         elif re.match(r'https?://vc\.bilibili\.com/video/(\d+)', self.url):
             sort = 'vc'
-        elif re.match(r'https?://(www\.)?bilibili\.com/video/(av(\d+)|(BV(\S+)))', self.url):
+        elif re.match(r'https?://(www\.)?bilibili\.com/video/(av(\d+)|(bv(\S+))|(BV(\S+)))', self.url):
             sort = 'video'
         elif re.match(r'https?://h\.?bilibili\.com/(\d+)', self.url):
             sort = 'h'
@@ -197,30 +214,47 @@ class Bilibili(VideoExtractor):
 
             playinfo_text = match1(html_content, r'__playinfo__=(.*?)</script><script>')  # FIXME
             playinfo = json.loads(playinfo_text) if playinfo_text else None
-            playinfo = playinfo if playinfo['code'] == 0 else None
+            playinfo = playinfo if playinfo and playinfo.get('code') == 0 else None
 
             html_content_ = get_content(self.url, headers=self.bilibili_headers(cookie='CURRENT_FNVAL=16'))
             playinfo_text_ = match1(html_content_, r'__playinfo__=(.*?)</script><script>')  # FIXME
             playinfo_ = json.loads(playinfo_text_) if playinfo_text_ else None
-            playinfo_ = playinfo_ if playinfo_['code'] == 0 else None
+            playinfo_ = playinfo_ if playinfo_ and playinfo_.get('code') == 0 else None
 
-            # warn if it is a multi-part video
-            pn = initial_state['videoData']['videos']
-            if pn > 1 and not kwargs.get('playlist'):
-                log.w('This is a multipart video. (use --playlist to download all parts.)')
+            if 'videoData' in initial_state:
+                # (standard video)
 
-            # set video title
-            self.title = initial_state['videoData']['title']
-            # refine title for a specific part, if it is a multi-part video
-            p = int(match1(self.url, r'[\?&]p=(\d+)') or match1(self.url, r'/index_(\d+)') or
-                    '1')  # use URL to decide p-number, not initial_state['p']
-            if pn > 1:
-                part = initial_state['videoData']['pages'][p - 1]['part']
-                self.title = '%s (P%s. %s)' % (self.title, p, part)
+                # warn if cookies are not loaded
+                if cookies is None:
+                    log.w('You will need login cookies for 720p formats or above. (use --cookies to load cookies.txt.)')
+
+                # warn if it is a multi-part video
+                pn = initial_state['videoData']['videos']
+                if pn > 1 and not kwargs.get('playlist'):
+                    log.w('This is a multipart video. (use --playlist to download all parts.)')
+
+                # set video title
+                self.title = initial_state['videoData']['title']
+                # refine title for a specific part, if it is a multi-part video
+                p = int(match1(self.url, r'[\?&]p=(\d+)') or match1(self.url, r'/index_(\d+)') or
+                        '1')  # use URL to decide p-number, not initial_state['p']
+                if pn > 1:
+                    part = initial_state['videoData']['pages'][p - 1]['part']
+                    self.title = '%s (P%s. %s)' % (self.title, p, part)
+
+                # construct playinfos
+                avid = initial_state['aid']
+                cid = initial_state['videoData']['pages'][p - 1]['cid']  # use p-number, not initial_state['videoData']['cid']
+            else:
+                # (festival video)
+
+                # set video title
+                self.title = initial_state['videoInfo']['title']
+
+                # construct playinfos
+                avid = initial_state['videoInfo']['aid']
+                cid = initial_state['videoInfo']['cid']
 
-            # construct playinfos
-            avid = initial_state['aid']
-            cid = initial_state['videoData']['pages'][p - 1]['cid']  # use p-number, not initial_state['videoData']['cid']
             current_quality, best_quality = None, None
             if playinfo is not None:
                 current_quality = playinfo['data']['quality'] or None  # 0 indicates an error, fallback to None
@@ -274,11 +308,10 @@ class Bilibili(VideoExtractor):
                 if 'dash' in playinfo['data']:
                     audio_size_cache = {}
                     for video in playinfo['data']['dash']['video']:
-                        # prefer the latter codecs!
                         s = self.stream_qualities[video['id']]
-                        format_id = 'dash-' + s['id']  # prefix
+                        format_id = f"dash-{s['id']}-{self.codecids[video['codecid']]}"  # prefix
                         container = 'mp4'  # enforce MP4 container
-                        desc = s['desc']
+                        desc = s['desc'] + ' ' + video['codecs']
                         audio_quality = s['audio_quality']
                         baseurl = video['baseUrl']
                         size = self.url_size(baseurl, headers=self.bilibili_headers(referer=self.url))
@@ -598,12 +631,14 @@ class Bilibili(VideoExtractor):
         elif re.match(r'https?://(www\.)?bilibili\.com/bangumi/media/md(\d+)', self.url) or \
             re.match(r'https?://bangumi\.bilibili\.com/anime/(\d+)', self.url):
             sort = 'bangumi_md'
-        elif re.match(r'https?://(www\.)?bilibili\.com/video/(av(\d+)|BV(\S+))', self.url):
+        elif re.match(r'https?://(www\.)?bilibili\.com/video/(av(\d+)|bv(\S+)|BV(\S+))', self.url):
             sort = 'video'
         elif re.match(r'https?://space\.?bilibili\.com/(\d+)/channel/detail\?.*cid=(\d+)', self.url):
             sort = 'space_channel'
         elif re.match(r'https?://space\.?bilibili\.com/(\d+)/channel/seriesdetail\?.*sid=(\d+)', self.url):
             sort = 'space_channel_series'
+        elif re.match(r'https?://space\.?bilibili\.com/(\d+)/channel/collectiondetail\?.*sid=(\d+)', self.url):
+            sort = 'space_channel_collection'
         elif re.match(r'https?://space\.?bilibili\.com/(\d+)/favlist\?.*fid=(\d+)', self.url):
             sort = 'space_favlist'
         elif re.match(r'https?://space\.?bilibili\.com/(\d+)/video', self.url):
@@ -717,13 +752,41 @@ class Bilibili(VideoExtractor):
         elif sort == 'space_channel_series':
             m = re.match(r'https?://space\.?bilibili\.com/(\d+)/channel/seriesdetail\?.*sid=(\d+)', self.url)
             mid, sid = m.group(1), m.group(2)
-            api_url = self.bilibili_series_archives_api(mid, sid)
-            api_content = get_content(api_url, headers=self.bilibili_headers(referer=self.url))
-            archives_info = json.loads(api_content)
-            # TBD: channel of more than 100 videos
+            pn = 1
+            video_list = []
+            while True:
+                api_url = self.bilibili_series_archives_api(mid, sid, pn)
+                api_content = get_content(api_url, headers=self.bilibili_headers(referer=self.url))
+                archives_info = json.loads(api_content)
+                video_list.extend(archives_info['data']['archives'])
+                if len(video_list) < archives_info['data']['page']['total'] and len(archives_info['data']['archives']) > 0:
+                    pn += 1
+                else:
+                    break
 
-            epn, i = len(archives_info['data']['archives']), 0
-            for video in archives_info['data']['archives']:
+            epn, i = len(video_list), 0
+            for video in video_list:
+                i += 1; log.w('Extracting %s of %s videos ...' % (i, epn))
+                url = 'https://www.bilibili.com/video/av%s' % video['aid']
+                self.__class__().download_playlist_by_url(url, **kwargs)
+
+        elif sort == 'space_channel_collection':
+            m = re.match(r'https?://space\.?bilibili\.com/(\d+)/channel/collectiondetail\?.*sid=(\d+)', self.url)
+            mid, sid = m.group(1), m.group(2)
+            pn = 1
+            video_list = []
+            while True:
+                api_url = self.bilibili_space_collection_api(mid, sid, pn)
+                api_content = get_content(api_url, headers=self.bilibili_headers(referer=self.url))
+                archives_info = json.loads(api_content)
+                video_list.extend(archives_info['data']['archives'])
+                if len(video_list) < archives_info['data']['page']['total'] and len(archives_info['data']['archives']) > 0:
+                    pn += 1
+                else:
+                    break
+
+            epn, i = len(video_list), 0
+            for video in video_list:
                 i += 1; log.w('Extracting %s of %s videos ...' % (i, epn))
                 url = 'https://www.bilibili.com/video/av%s' % video['aid']
                 self.__class__().download_playlist_by_url(url, **kwargs)
diff --git a/src/you_get/extractors/douyin.py b/src/you_get/extractors/douyin.py
index 8067b1b5..4b60de3c 100644
--- a/src/you_get/extractors/douyin.py
+++ b/src/you_get/extractors/douyin.py
@@ -1,8 +1,6 @@
 # coding=utf-8
 
-import re
 import json
-from urllib.parse import unquote
 
 from ..common import (
     url_size,
@@ -11,25 +9,52 @@ from ..common import (
     fake_headers,
     download_urls,
     playlist_not_supported,
+    match1,
+    get_location,
 )
 
-
 __all__ = ['douyin_download_by_url']
 
 
+def get_value(source: dict, path):
+    try:
+        value = source
+        for key in path:
+            if type(key) is str:
+                if key in value.keys():
+                    value = value[key]
+                else:
+                    value = None
+                    break
+            elif type(key) is int:
+                if len(value) != 0:
+                    value = value[key]
+                else:
+                    value = None
+                    break
+    except:
+        value = None
+    return value
+
+
 def douyin_download_by_url(url, **kwargs):
+    # if short link, get the real url
+    if 'v.douyin.com' in url:
+        url = get_location(url)
+    aweme_id = match1(url, r'/(\d+)/?')
+    # get video info
+    video_info_api = 'https://www.douyin.com/web/api/v2/aweme/iteminfo/?item_ids={}'
+    url = video_info_api.format(aweme_id)
     page_content = get_content(url, headers=fake_headers)
-    # The video player and video source are rendered client-side, the data
-    # contains in a <script id="RENDER_DATA" type="application/json"> tag
-    # quoted, unquote the whole page content then search using regex with
-    # regular string.
-    page_content = unquote(page_content)
-    title = re.findall(r'"desc":"([^"]*)"', page_content)[0].strip()
+    video_info = json.loads(page_content)
+
+    # get video id and title
+    video_id = get_value(video_info, ['item_list', 0, 'video', 'vid'])
+    title = get_value(video_info, ['item_list', 0, 'desc'])
+
+    # get video play url
+    video_url = "https://aweme.snssdk.com/aweme/v1/play/?ratio=720p&line=0&video_id={}".format(video_id)
     video_format = 'mp4'
-    # video URLs are in this pattern {"src":"THE_URL"}, in json format
-    urls_pattern = r'"playAddr":(\[.*?\])'
-    urls = json.loads(re.findall(urls_pattern, page_content)[0])
-    video_url = 'https:' + urls[0]['src']
     size = url_size(video_url, faker=True)
     print_info(
         site_info='douyin.com', title=title,
diff --git a/src/you_get/extractors/instagram.py b/src/you_get/extractors/instagram.py
index 4167b226..8e261fe7 100755
--- a/src/you_get/extractors/instagram.py
+++ b/src/you_get/extractors/instagram.py
@@ -10,60 +10,50 @@ def instagram_download(url, output_dir='.', merge=True, info_only=False, **kwarg
 
     vid = r1(r'instagram.com/\w+/([^/]+)', url)
     description = r1(r'<meta property="og:title" content="([^"]*)"', cont) or \
-        r1(r'<title>\s([^<]*)</title>', cont) # with logged-in cookies
+        r1(r'<title>([^<]*)</title>', cont) # with logged-in cookies
     title = "{} [{}]".format(description.replace("\n", " "), vid)
 
-    stream = r1(r'<meta property="og:video" content="([^"]*)"', cont)
-    if stream:
-        _, ext, size = url_info(stream)
+    appId = r1(r'"appId":"(\d+)"', cont)
+    media_id = r1(r'"media_id":"(\d+)"', cont)
 
-        print_info(site_info, title, ext, size)
-        if not info_only:
-            download_urls([stream], title, ext, size, output_dir, merge=merge)
-    else:
-        data = re.search(r'window\._sharedData\s*=\s*(.*);</script>', cont)
-        try:
-            info = json.loads(data.group(1))
-            post = info['entry_data']['PostPage'][0]
-            assert post['items']
-        except:
-            # with logged-in cookies
-            data = re.search(r'window\.__additionalDataLoaded\(\'[^\']+\',(.*)\);</script>', cont)
-            if data is not None:
-                log.e('[Warning] Cookies needed.')
-            post = json.loads(data.group(1))
+    api_url = 'https://i.instagram.com/api/v1/media/%s/info/' % media_id
+    try:
+        api_cont = get_content(api_url, headers={**fake_headers, **{'x-ig-app-id': appId}})
+        post = json.loads(api_cont)
+    except:
+        log.wtf('[Error] Please specify a cookie file.')
 
-        for item in post['items']:
-            code = item['code']
-            carousel_media = item.get('carousel_media') or [item]
-            for i, media in enumerate(carousel_media):
-                title = '%s [%s]' % (code, i)
-                image_url = media['image_versions2']['candidates'][0]['url']
-                ext = image_url.split('?')[0].split('.')[-1]
-                size = int(get_head(image_url)['Content-Length'])
+    for item in post['items']:
+        code = item['code']
+        carousel_media = item.get('carousel_media') or [item]
+        for i, media in enumerate(carousel_media):
+            title = '%s [%s]' % (code, i)
+            image_url = media['image_versions2']['candidates'][0]['url']
+            ext = image_url.split('?')[0].split('.')[-1]
+            size = int(get_head(image_url)['Content-Length'])
+
+            print_info(site_info, title, ext, size)
+            if not info_only:
+                download_urls(urls=[image_url],
+                              title=title,
+                              ext=ext,
+                              total_size=size,
+                              output_dir=output_dir)
+
+            # download videos (if any)
+            if 'video_versions' in media:
+                video_url = media['video_versions'][0]['url']
+                ext = video_url.split('?')[0].split('.')[-1]
+                size = int(get_head(video_url)['Content-Length'])
 
                 print_info(site_info, title, ext, size)
                 if not info_only:
-                    download_urls(urls=[image_url],
+                    download_urls(urls=[video_url],
                                   title=title,
                                   ext=ext,
                                   total_size=size,
                                   output_dir=output_dir)
 
-                # download videos (if any)
-                if 'video_versions' in media:
-                    video_url = media['video_versions'][0]['url']
-                    ext = video_url.split('?')[0].split('.')[-1]
-                    size = int(get_head(video_url)['Content-Length'])
-
-                    print_info(site_info, title, ext, size)
-                    if not info_only:
-                        download_urls(urls=[video_url],
-                                      title=title,
-                                      ext=ext,
-                                      total_size=size,
-                                      output_dir=output_dir)
-
 site_info = "Instagram.com"
 download = instagram_download
 download_playlist = playlist_not_supported('instagram')
diff --git a/src/you_get/extractors/iqiyi.py b/src/you_get/extractors/iqiyi.py
index d138a49f..16bf45d3 100644
--- a/src/you_get/extractors/iqiyi.py
+++ b/src/you_get/extractors/iqiyi.py
@@ -131,10 +131,10 @@ class Iqiyi(VideoExtractor):
             html = get_html(self.url)
             tvid = r1(r'#curid=(.+)_', self.url) or \
                    r1(r'tvid=([^&]+)', self.url) or \
-                   r1(r'data-player-tvid="([^"]+)"', html) or r1(r'tv(?:i|I)d=(.+?)\&', html) or r1(r'param\[\'tvid\'\]\s*=\s*"(.+?)"', html)
+                   r1(r'data-player-tvid="([^"]+)"', html) or r1(r'tv(?:i|I)d=(\w+?)\&', html) or r1(r'param\[\'tvid\'\]\s*=\s*"(.+?)"', html)
             videoid = r1(r'#curid=.+_(.*)$', self.url) or \
                       r1(r'vid=([^&]+)', self.url) or \
-                      r1(r'data-player-videoid="([^"]+)"', html) or r1(r'vid=(.+?)\&', html) or r1(r'param\[\'vid\'\]\s*=\s*"(.+?)"', html)
+                      r1(r'data-player-videoid="([^"]+)"', html) or r1(r'vid=(\w+?)\&', html) or r1(r'param\[\'vid\'\]\s*=\s*"(.+?)"', html)
             self.vid = (tvid, videoid)
             info_u = 'http://pcw-api.iqiyi.com/video/video/playervideoinfo?tvid=' + tvid
             json_res = get_content(info_u)
@@ -203,8 +203,13 @@ class Iqiyi(VideoExtractor):
             # For legacy main()
 
             #Here's the change!!
-            download_url_ffmpeg(urls[0], self.title, 'mp4', output_dir=kwargs['output_dir'], merge=kwargs['merge'], stream=False)
-
+            # ffmpeg fails to parse.
+            # download_url_ffmpeg(urls[0], self.title, 'mp4', output_dir=kwargs['output_dir'], merge=kwargs['merge'], stream=False)
+            #Here's the way works out
+            urls = general_m3u8_extractor(urls[0])
+            # ffmpeg fail to convert the output video with mkv extension, due to sort of timestamp problem
+            download_urls(urls, self.title, 'mp4', 0, **kwargs)
+            
             if not kwargs['caption']:
                 print('Skipping captions.')
                 return
diff --git a/src/you_get/extractors/ixigua.py b/src/you_get/extractors/ixigua.py
index 2f11e7f9..f2fd953e 100644
--- a/src/you_get/extractors/ixigua.py
+++ b/src/you_get/extractors/ixigua.py
@@ -18,121 +18,97 @@ headers = {
 }
 
 
-def int_overflow(val):
-    maxint = 2147483647
-    if not -maxint - 1 <= val <= maxint:
-        val = (val + (maxint + 1)) % (2 * (maxint + 1)) - maxint - 1
-    return val
-
-
-def unsigned_right_shitf(n, i):
-    if n < 0:
-        n = ctypes.c_uint32(n).value
-    if i < 0:
-        return -int_overflow(n << abs(i))
-    return int_overflow(n >> i)
-
-
-def get_video_url_from_video_id(video_id):
-    """Splicing URLs according to video ID to get video details"""
-    # from js
-    data = [""] * 256
-    for index, _ in enumerate(data):
-        t = index
-        for i in range(8):
-            t = -306674912 ^ unsigned_right_shitf(t, 1) if 1 & t else unsigned_right_shitf(t, 1)
-        data[index] = t
-
-    def tmp():
-        rand_num = random.random()
-        path = "/video/urls/v/1/toutiao/mp4/{video_id}?r={random_num}".format(video_id=video_id,
-                                                                              random_num=str(rand_num)[2:])
-        e = o = r = -1
-        i, a = 0, len(path)
-        while i < a:
-            e = ord(path[i])
-            i += 1
-            if e < 128:
-                r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ e)]
-            else:
-                if e < 2048:
-                    r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (192 | e >> 6 & 31))]
-                    r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | 63 & e))]
-                else:
-                    if 55296 <= e < 57344:
-                        e = (1023 & e) + 64
-                        i += 1
-                        o = 1023 & t.url(i)
-                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (240 | e >> 8 & 7))]
-                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | e >> 2 & 63))]
-                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | o >> 6 & 15 | (3 & e) << 4))]
-                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | 63 & o))]
-                    else:
-                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (224 | e >> 12 & 15))]
-                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | e >> 6 & 63))]
-                        r = unsigned_right_shitf(r, 8) ^ data[255 & (r ^ (128 | 63 & e))]
-
-        return "https://ib.365yg.com{path}&s={param}".format(path=path, param=unsigned_right_shitf(r ^ -1, 0))
-
-    while 1:
-        url = tmp()
-        if url.split("=")[-1][0] != "-":  # 参数s不能为负数
-            return url
-
-
-def ixigua_download(url, output_dir='.', merge=True, info_only=False, **kwargs):
+def ixigua_download(url, output_dir='.', merge=True, info_only=False, stream_id='', **kwargs):
     # example url: https://www.ixigua.com/i6631065141750268420/#mid=63024814422
-    resp = urlopen_with_retry(request.Request(url))
+    headers['cookie'] = "MONITOR_WEB_ID=7892c49b-296e-4499-8704-e47c1b15123; " \
+                        "ixigua-a-s=1; ttcid=af99669b6304453480454f1507011d5c234; BD_REF=1; " \
+                        "__ac_nonce=060d88ff000a75e8d17eb; __ac_signature=_02B4Z6wo100f01kX9ZpgAAIDAKIBBQUIPYT5F2WIAAPG2ad; " \
+                        "ttwid=1%7CcIsVF_3vqSIk4XErhPB0H2VaTxT0tdsTMRbMjrJOPN8%7C1624806049%7C08ce7dd6f7d20506a41ba0a331ef96a6505d96731e6ad9f6c8c709f53f227ab1; "
+
+    resp = urlopen_with_retry(request.Request(url, headers=headers))
     html = resp.read().decode('utf-8')
 
     _cookies = []
     for c in resp.getheader('Set-Cookie').split("httponly,"):
         _cookies.append(c.strip().split(' ')[0])
-    headers['cookie'] = ' '.join(_cookies)
+    headers['cookie'] += ' '.join(_cookies)
 
-    conf = loads(match1(html, r"window\.config = (.+);"))
-    if not conf:
-        log.e("Get window.config from url failed, url: {}".format(url))
+    match_txt = match1(html, r"<script id=\"SSR_HYDRATED_DATA\">window._SSR_HYDRATED_DATA=(.*?)<\/script>")
+    if not match_txt:
+        log.e("Get video info from url failed, url: {}".format(url))
         return
-    verify_url = conf['prefix'] + conf['url'] + '?key=' + conf['key'] + '&psm=' + conf['psm'] \
-        + '&_signature=' + ''.join(random.sample(string.ascii_letters + string.digits, 31))
-    try:
-        ok = get_content(verify_url)
-    except Exception as e:
-        ok = e.msg
-    if ok != 'OK':
-        log.e("Verify failed, verify_url: {}, result: {}".format(verify_url, ok))
+    video_info = loads(match_txt.replace('":undefined', '":null'))
+    if not video_info:
+        log.e("video_info not found, url:{}".format(url))
         return
-    html = get_content(url, headers=headers)
 
-    video_id = match1(html, r"\"vid\":\"([^\"]+)")
-    title = match1(html, r"\"player__videoTitle\">.*?<h1.*?>(.*)<\/h1><\/div>")
-    if not video_id:
-        log.e("video_id not found, url:{}".format(url))
+    title = video_info['anyVideo']['gidInformation']['packerData']['video']['title']
+    video_resource = video_info['anyVideo']['gidInformation']['packerData']['video']['videoResource']
+    if video_resource.get('dash', None):
+        video_list = video_resource['dash']
+    elif video_resource.get('dash_120fps', None):
+        video_list = video_resource['dash_120fps']
+    elif video_resource.get('normal', None):
+        video_list = video_resource['normal']
+    else:
+        log.e("video_list not found, url:{}".format(url))
         return
-    video_info_url = get_video_url_from_video_id(video_id)
-    video_info = loads(get_content(video_info_url))
-    if video_info.get("code", 1) != 0:
-        log.e("Get video info from {} error: server return code {}".format(video_info_url, video_info.get("code", 1)))
-        return
-    if not video_info.get("data", None):
-        log.e("Get video info from {} error: The server returns JSON value"
-              " without data or data is empty".format(video_info_url))
-        return
-    if not video_info["data"].get("video_list", None):
-        log.e("Get video info from {} error: The server returns JSON value"
-              " without data.video_list or data.video_list is empty".format(video_info_url))
-        return
-    if not video_info["data"]["video_list"].get("video_1", None):
-        log.e("Get video info from {} error: The server returns JSON value"
-              " without data.video_list.video_1 or data.video_list.video_1 is empty".format(video_info_url))
-        return
-    bestQualityVideo = list(video_info["data"]["video_list"].keys())[-1] #There is not only video_1, there might be video_2
-    size = int(video_info["data"]["video_list"][bestQualityVideo]["size"])
-    print_info(site_info=site_info, title=title, type="mp4", size=size)  # 该网站只有mp4类型文件
-    if not info_only:
-        video_url = base64.b64decode(video_info["data"]["video_list"][bestQualityVideo]["main_url"].encode("utf-8"))
-        download_urls([video_url.decode("utf-8")], title, "mp4", size, output_dir, merge=merge, headers=headers, **kwargs)
+
+    streams = [
+        # {'file_id': 'fc1b9bf8e8e04a849d90a5172d3f6919', 'quality': "normal", 'size': 0,
+        #  'definition': '720p', 'video_url': '','audio_url':'','v_type':'dash'},
+    ]
+    # 先用无水印的视频与音频合成，没有的话，再直接用有水印的mp4
+    if video_list.get('dynamic_video', None):
+        audio_url = base64.b64decode(
+            video_list['dynamic_video']['dynamic_audio_list'][0]['main_url'].encode("utf-8")).decode("utf-8")
+        dynamic_video_list = video_list['dynamic_video']['dynamic_video_list']
+        streams = convertStreams(dynamic_video_list, audio_url)
+    elif video_list.get('video_list', None):
+        dynamic_video_list = video_list['video_list']
+        streams = convertStreams(dynamic_video_list, "")
+
+    print("title:          %s" % title)
+    for stream in streams:
+        if stream_id != "" and stream_id != stream['definition']:
+            continue
+
+        print("    - format:        %s" % stream['definition'])
+        print("      size:          %s MiB (%s bytes)" % (round(stream['size'] / 1048576, 1), stream['size']))
+        print("      quality:       %s " % stream['quality'])
+        print("      v_type:        %s " % stream['v_type'])
+        # print("      video_url:          %s " % stream['video_url'])
+        # print("      audio_url:          %s " % stream['audio_url'])
+        print()
+
+        # 不是只看信息的话，就下载第一个
+        if not info_only:
+            urls = [stream['video_url']]
+            if stream['audio_url'] != "":
+                urls.append(stream['audio_url'])
+                kwargs['av'] = 'av'  # 这将会合并音视频
+
+            download_urls(urls, title, "mp4", stream['size'], output_dir, merge=merge, headers=headers,
+                          **kwargs)
+            return
+
+
+def convertStreams(video_list, audio_url):
+    streams = []
+    if type(video_list) == dict:
+        video_list = video_list.values()
+    for dynamic_video in video_list:
+        streams.append({
+            'file_id': dynamic_video['file_hash'],
+            'quality': dynamic_video['quality'],
+            'size': dynamic_video['size'],
+            'definition': dynamic_video['definition'],
+            'video_url': base64.b64decode(dynamic_video['main_url'].encode("utf-8")).decode("utf-8"),
+            'audio_url': audio_url,
+            'v_type': dynamic_video['vtype'],
+        })
+
+    return streams
 
 
 def ixigua_download_playlist_by_url(url, output_dir='.', merge=True, info_only=False, **kwargs):
diff --git a/src/you_get/extractors/miaopai.py b/src/you_get/extractors/miaopai.py
index 05c1e650..91a301b8 100644
--- a/src/you_get/extractors/miaopai.py
+++ b/src/you_get/extractors/miaopai.py
@@ -80,6 +80,8 @@ def miaopai_download_story(url, output_dir='.', merge=False, info_only=False, **
 
 def miaopai_download_h5api(url, output_dir='.', merge=False, info_only=False, **kwargs):
     oid = match1(url, r'/show/(\d{4}:\w+)')
+    if oid is None:
+        oid = match1(url, r'\?fid=(\d{4}:\w+)')
     page = "/show/%s" % oid
     data_url = 'https://h5.video.weibo.com/api/component?%s' % parse.urlencode({
         'page': page
@@ -156,6 +158,9 @@ def miaopai_download(url, output_dir='.', merge=False, info_only=False, **kwargs
     if re.match(r'^http[s]://(.+\.)?weibo\.com/(tv/)?show/(\d{4}:\w+)', url):
         return miaopai_download_h5api(url, info_only=info_only, output_dir=output_dir, merge=merge, **kwargs)
 
+    if re.match(r'^http[s]://(.+\.)?weibo\.com/show\?fid=(\d{4}:\w+)', url):
+        return miaopai_download_h5api(url, info_only=info_only, output_dir=output_dir, merge=merge, **kwargs)
+
     fid = match1(url, r'\?fid=(\d{4}:\w+)')
     if fid is not None:
         miaopai_download_by_fid(fid, output_dir, merge, info_only)
diff --git a/src/you_get/extractors/missevan.py b/src/you_get/extractors/missevan.py
index b7f413f2..6d9533ce 100644
--- a/src/you_get/extractors/missevan.py
+++ b/src/you_get/extractors/missevan.py
@@ -25,6 +25,7 @@ SOFTWARE.
 import json
 import os
 import re
+import urllib.parse
 
 from ..common import get_content, urls_size, log, player, dry_run
 from ..extractor import VideoExtractor
@@ -99,7 +100,8 @@ def is_covers_stream(stream):
     return stream.lower() in ('covers', 'coversmini')
 
 def get_file_extension(file_path, default=''):
-    _, suffix = os.path.splitext(file_path)
+    url_parse_result = urllib.parse.urlparse(file_path)
+    _, suffix = os.path.splitext(url_parse_result.path)
     if suffix:
         # remove dot
         suffix = suffix[1:]
@@ -310,7 +312,7 @@ class MissEvan(VideoExtractor):
                 or kwargs.get('json_output'):
 
             for _, stream in self.streams.items():
-                stream['size'] = urls_size(stream['src'])
+                stream['size'] = urls_size(stream['src'], faker=True)
             return
 
         # fetch size of the selected stream only
@@ -319,7 +321,7 @@ class MissEvan(VideoExtractor):
 
         stream = self.streams[stream_id]
         if 'size' not in stream:
-            stream['size'] = urls_size(stream['src'])
+            stream['size'] = urls_size(stream['src'], faker=True)
 
     def _get_content(self, url):
         return get_content(url, headers=self.__headers)
diff --git a/src/you_get/extractors/netease.py b/src/you_get/extractors/netease.py
index ca1be887..48e6dc53 100644
--- a/src/you_get/extractors/netease.py
+++ b/src/you_get/extractors/netease.py
@@ -79,9 +79,14 @@ def netease_cloud_music_download(url, output_dir='.', merge=True, info_only=Fals
         netease_song_download(j["program"]["mainSong"], output_dir=output_dir, info_only=info_only)
 
     elif "radio" in url:
-        j = loads(get_content("http://music.163.com/api/dj/program/byradio/?radioId=%s&ids=[%s]&csrf_token=" % (rid, rid), headers={"Referer": "http://music.163.com/"}))
-        for i in j['programs']:
-            netease_song_download(i["mainSong"],output_dir=output_dir, info_only=info_only)
+        offset = 0
+        while True:
+            j = loads(get_content("http://music.163.com/api/dj/program/byradio/?radioId=%s&ids=[%s]&csrf_token=&offset=%d" % (rid, rid, offset), headers={"Referer": "http://music.163.com/"}))
+            for i in j['programs']:
+                netease_song_download(i["mainSong"], output_dir=output_dir, info_only=info_only)
+            if not j['more']:
+                break
+            offset += len(j['programs'])
 
     elif "mv" in url:
         j = loads(get_content("http://music.163.com/api/mv/detail/?id=%s&ids=[%s]&csrf_token=" % (rid, rid), headers={"Referer": "http://music.163.com/"}))
diff --git a/src/you_get/extractors/tiktok.py b/src/you_get/extractors/tiktok.py
index 2ef05226..2c4892f6 100644
--- a/src/you_get/extractors/tiktok.py
+++ b/src/you_get/extractors/tiktok.py
@@ -5,42 +5,41 @@ __all__ = ['tiktok_download']
 from ..common import *
 
 def tiktok_download(url, output_dir='.', merge=True, info_only=False, **kwargs):
-    referUrl = url.split('?')[0]
-    headers = fake_headers
+    headers = {
+        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0',
+        'Accept-Encoding': 'gzip, deflate',
+        'Accept': '*/*',
+        'Referer': 'https://www.tiktok.com/',
+        'Connection': 'keep-alive'  # important
+    }
 
-    # trick or treat
-    html = get_content(url, headers=headers)
-    data = r1(r'<script id="__NEXT_DATA__".*?>(.*?)</script>', html)
+    m = re.match('(https?://)?([^/]+)(/.*)', url)
+    host = m.group(2)
+    if host != 'www.tiktok.com':  # non-canonical URL
+        vid = r1(r'/video/(\d+)', url)
+        url = 'https://www.tiktok.com/@/video/%s/' % vid
+        host = 'www.tiktok.com'
+    else:
+        url = m.group(3).split('?')[0]
+        vid = url.split('/')[3]  # should be a string of numbers
+
+    html, set_cookie = getHttps(host, url, headers=headers)
+    tt_chain_token = r1('tt_chain_token=([^;]+);', set_cookie)
+    headers['Cookie'] = 'tt_chain_token=%s' % tt_chain_token
+
+    data = r1(r'window\[\'SIGI_STATE\'\]=(.*?);window\[\'SIGI_RETRY\'\]', html) or \
+        r1(r'<script id="SIGI_STATE" type="application/json">(.*?)</script>', html)
     info = json.loads(data)
-    wid = info['props']['initialProps']['$wid']
-    cookie = 'tt_webid=%s; tt_webid_v2=%s' % (wid, wid)
+    downloadAddr = info['ItemModule'][vid]['video']['downloadAddr']
+    author = info['ItemModule'][vid]['author']  # same as uniqueId
+    nickname = info['UserModule']['users'][author]['nickname']
+    title = '%s [%s]' % (nickname or author, vid)
 
-    # here's the cookie
-    headers['Cookie'] = cookie
-
-    # try again
-    html = get_content(url, headers=headers)
-    data = r1(r'<script id="__NEXT_DATA__".*?>(.*?)</script>', html)
-    info = json.loads(data)
-    wid = info['props']['initialProps']['$wid']
-    cookie = 'tt_webid=%s; tt_webid_v2=%s' % (wid, wid)
-
-    videoData = info['props']['pageProps']['itemInfo']['itemStruct']
-    videoId = videoData['id']
-    videoUrl = videoData['video']['downloadAddr']
-    uniqueId = videoData['author'].get('uniqueId')
-    nickName = videoData['author'].get('nickname')
-
-    title = '%s [%s]' % (nickName or uniqueId, videoId)
-
-    # we also need the referer
-    headers['Referer'] = referUrl
-
-    mime, ext, size = url_info(videoUrl, headers=headers)
+    mime, ext, size = url_info(downloadAddr, headers=headers)
 
     print_info(site_info, title, mime, size)
     if not info_only:
-        download_urls([videoUrl], title, ext, size, output_dir=output_dir, merge=merge, headers=headers)
+        download_urls([downloadAddr], title, ext, size, output_dir=output_dir, merge=merge, headers=headers)
 
 site_info = "TikTok.com"
 download = tiktok_download
diff --git a/src/you_get/extractors/twitter.py b/src/you_get/extractors/twitter.py
index 23468211..4a439fe8 100644
--- a/src/you_get/extractors/twitter.py
+++ b/src/you_get/extractors/twitter.py
@@ -23,7 +23,7 @@ def twitter_download(url, output_dir='.', merge=True, info_only=False, **kwargs)
     if re.match(r'https?://mobile', url): # normalize mobile URL
         url = 'https://' + match1(url, r'//mobile\.(.+)')
 
-    if re.match(r'https?://twitter\.com/i/moments/', url): # moments
+    if re.match(r'https?://twitter\.com/i/moments/', url): # FIXME: moments
         html = get_html(url, faker=True)
         paths = re.findall(r'data-permalink-path="([^"]+)"', html)
         for path in paths:
@@ -34,70 +34,48 @@ def twitter_download(url, output_dir='.', merge=True, info_only=False, **kwargs)
                              **kwargs)
         return
 
-    html = get_html(url, faker=True) # now it seems faker must be enabled
-    screen_name = r1(r'twitter\.com/([^/]+)', url) or r1(r'data-screen-name="([^"]*)"', html) or \
-        r1(r'<meta name="twitter:title" content="([^"]*)"', html)
-    item_id = r1(r'twitter\.com/[^/]+/status/(\d+)', url) or r1(r'data-item-id="([^"]*)"', html) or \
-        r1(r'<meta name="twitter:site:id" content="([^"]*)"', html)
+    m = re.match('^https?://(mobile\.)?twitter\.com/([^/]+)/status/(\d+)', url)
+    assert m
+    screen_name, item_id = m.group(2), m.group(3)
     page_title = "{} [{}]".format(screen_name, item_id)
 
-    authorization = 'Bearer AAAAAAAAAAAAAAAAAAAAANRILgAAAAAAnNwIzUejRCOuH5E6I8xnZz4puTs%3D1Zv7ttfk8LF81IUq16cHjhLTvJu4FA33AGWWjCpTnA'
+    # FIXME: this API won't work for protected or nsfw contents
+    api_url = 'https://cdn.syndication.twimg.com/tweet-result?id=%s' % item_id
+    content = get_content(api_url)
+    info = json.loads(content)
 
-    ga_url = 'https://api.twitter.com/1.1/guest/activate.json'
-    ga_content = post_content(ga_url, headers={'authorization': authorization})
-    guest_token = json.loads(ga_content)['guest_token']
+    author = info['user']['name']
+    url = 'https://twitter.com/%s/status/%s' % (info['user']['screen_name'], item_id)
+    full_text = info['text']
 
-    api_url = 'https://api.twitter.com/2/timeline/conversation/%s.json?tweet_mode=extended' % item_id
-    api_content = get_content(api_url, headers={'authorization': authorization, 'x-guest-token': guest_token})
-
-    info = json.loads(api_content)
-    if 'extended_entities' in info['globalObjects']['tweets'][item_id]:
-        # if the tweet contains media, download them
-        media = info['globalObjects']['tweets'][item_id]['extended_entities']['media']
-
-    elif info['globalObjects']['tweets'][item_id].get('is_quote_status') == True:
-        # if the tweet does not contain media, but it quotes a tweet
-        # and the quoted tweet contains media, download them
-        item_id = info['globalObjects']['tweets'][item_id]['quoted_status_id_str']
-
-        api_url = 'https://api.twitter.com/2/timeline/conversation/%s.json?tweet_mode=extended' % item_id
-        api_content = get_content(api_url, headers={'authorization': authorization, 'x-guest-token': guest_token})
-
-        info = json.loads(api_content)
-
-        if 'extended_entities' in info['globalObjects']['tweets'][item_id]:
-            media = info['globalObjects']['tweets'][item_id]['extended_entities']['media']
-        else:
-            # quoted tweet has no media
-            return
-
-    else:
-        # no media, no quoted tweet
-        return
-
-    for medium in media:
-        if 'video_info' in medium:
-            # FIXME: we're assuming one tweet only contains one video here
-            variants = medium['video_info']['variants']
-            variants = sorted(variants, key=lambda kv: kv.get('bitrate', 0))
-            urls = [ variants[-1]['url'] ]
+    if 'photos' in info:
+        for photo in info['photos']:
+            photo_url = photo['url']
+            title = item_id + '_' + photo_url.split('.')[-2].split('/')[-1]
+            urls = [ photo_url + ':orig' ]
             size = urls_size(urls)
-            mime, ext = variants[-1]['content_type'], 'mp4'
-
-            print_info(site_info, page_title, mime, size)
-            if not info_only:
-                download_urls(urls, page_title, ext, size, output_dir, merge=merge)
-
-        else:
-            title = item_id + '_' + medium['media_url_https'].split('.')[-2].split('/')[-1]
-            urls = [ medium['media_url_https'] + ':orig' ]
-            size = urls_size(urls)
-            ext = medium['media_url_https'].split('.')[-1]
+            ext = photo_url.split('.')[-1]
 
             print_info(site_info, title, ext, size)
             if not info_only:
                 download_urls(urls, title, ext, size, output_dir, merge=merge)
 
+    if 'video' in info:
+        for mediaDetail in info['mediaDetails']:
+            if 'video_info' not in mediaDetail: continue
+            variants = mediaDetail['video_info']['variants']
+            variants = sorted(variants, key=lambda kv: kv.get('bitrate', 0))
+            title = item_id + '_' + variants[-1]['url'].split('/')[-1].split('?')[0].split('.')[0]
+            urls = [ variants[-1]['url'] ]
+            size = urls_size(urls)
+            mime, ext = variants[-1]['content_type'], 'mp4'
+
+            print_info(site_info, title, ext, size)
+            if not info_only:
+                download_urls(urls, title, ext, size, output_dir, merge=merge)
+
+    # TODO: should we deal with quoted tweets?
+
 
 site_info = "Twitter.com"
 download = twitter_download
diff --git a/src/you_get/extractors/youku.py b/src/you_get/extractors/youku.py
index 92cdafb6..ed0743bb 100644
--- a/src/you_get/extractors/youku.py
+++ b/src/you_get/extractors/youku.py
@@ -77,7 +77,7 @@ class Youku(VideoExtractor):
         self.api_error_code = None
         self.api_error_msg = None
 
-        self.ccode = '0532'
+        self.ccode = '0564'
         # Found in http://g.alicdn.com/player/ykplayer/0.5.64/youku-player.min.js
         # grep -oE '"[0-9a-zA-Z+/=]{256}"' youku-player.min.js
         self.ckey = 'DIl58SLFxFNndSV1GFNnMQVYkx1PP5tKe1siZu/86PR1u/Wh1Ptd+WOZsHHWxysSfAOhNJpdVWsdVJNsfJ8Sxd8WKVvNfAS8aS8fAOzYARzPyPc3JvtnPHjTdKfESTdnuTW6ZPvk2pNDh4uFzotgdMEFkzQ5wZVXl2Pf1/Y6hLK0OnCNxBj3+nb0v72gZ6b0td+WOZsHHWxysSo/0y9D2K42SaB8Y/+aD2K42SaB8Y/+ahU+WOZsHcrxysooUeND'
diff --git a/src/you_get/extractors/youtube.py b/src/you_get/extractors/youtube.py
index b5f56fa4..ddf12be9 100644
--- a/src/you_get/extractors/youtube.py
+++ b/src/you_get/extractors/youtube.py
@@ -79,6 +79,7 @@ class YouTube(VideoExtractor):
         # - https://www.youtube.com/s/player/0b643cd1/player_ias.vflset/sv_SE/base.js
         # - https://www.youtube.com/s/player/50e823fc/player_ias.vflset/sv_SE/base.js
         # - https://www.youtube.com/s/player/3b5d5649/player_ias.vflset/sv_SE/base.js
+        # - https://www.youtube.com/s/player/dc0c6770/player_ias.vflset/sv_SE/base.js
         def tr_js(code):
             code = re.sub(r'function', r'def', code)
             # add prefix '_sig_' to prevent namespace pollution
@@ -114,14 +115,10 @@ class YouTube(VideoExtractor):
             else:
                 f2def = re.search(r'[^$\w]%s:function\((\w+)\)(\{[^\{\}]+\})' % f2e, js)
                 f2def = 'function {}({},b){}'.format(f2e, f2def.group(1), f2def.group(2))
-            f2 = re.sub(r'(as|if|in|is|or)', r'_\1', f2)
-            f2 = re.sub(r'\$', '_dollar', f2)
+            f2 = re.sub(r'\$', '_dollar', f2)  # replace dollar sign
             code = code + 'global _sig_%s\n' % f2 + tr_js(f2def)
 
-        # if f1 contains more than 2 characters, no need to do substitution
-        # FIXME: we probably shouldn't do any substitution here at all?
-        f1 = re.sub(r'^(as|if|in|is|or)$', r'_\1', f1)
-        f1 = re.sub(r'\$', '_dollar', f1)
+        f1 = re.sub(r'\$', '_dollar', f1)  # replace dollar sign
         code = code + '_sig=_sig_%s(s)' % f1
         exec(code, globals(), locals())
         return locals()['_sig']
@@ -237,7 +234,10 @@ class YouTube(VideoExtractor):
 
                     except:
                         # ytplayer_config = {args:{raw_player_response:ytInitialPlayerResponse}}
-                        ytInitialPlayerResponse = json.loads(re.search('ytInitialPlayerResponse\s*=\s*([^\n]+?});', video_page).group(1))
+                        try:  # FIXME: we should extract ytInitialPlayerResponse more reliably
+                            ytInitialPlayerResponse = json.loads(re.search('ytInitialPlayerResponse\s*=\s*([^\n]+?});</script>', video_page).group(1))
+                        except:
+                            ytInitialPlayerResponse = json.loads(re.search('ytInitialPlayerResponse\s*=\s*([^\n]+?});', video_page).group(1))
 
                         stream_list = ytInitialPlayerResponse['streamingData']['formats']
                         #stream_list = ytInitialPlayerResponse['streamingData']['adaptiveFormats']
@@ -262,7 +262,10 @@ class YouTube(VideoExtractor):
                 # Parse video page instead
                 video_page = get_content('https://www.youtube.com/watch?v=%s' % self.vid)
 
-                ytInitialPlayerResponse = json.loads(re.search('ytInitialPlayerResponse\s*=\s*([^\n]+?});', video_page).group(1))
+                try:  # FIXME: we should extract ytInitialPlayerResponse more reliably
+                    ytInitialPlayerResponse = json.loads(re.search('ytInitialPlayerResponse\s*=\s*([^\n]+?});</script>', video_page).group(1))
+                except:
+                    ytInitialPlayerResponse = json.loads(re.search('ytInitialPlayerResponse\s*=\s*([^\n]+?});', video_page).group(1))
 
                 self.title = ytInitialPlayerResponse["videoDetails"]["title"]
                 if re.search('([^"]*/base\.js)"', video_page):
diff --git a/src/you_get/processor/ffmpeg.py b/src/you_get/processor/ffmpeg.py
index e8639e89..4bbbd177 100755
--- a/src/you_get/processor/ffmpeg.py
+++ b/src/you_get/processor/ffmpeg.py
@@ -128,7 +128,7 @@ def ffmpeg_concat_mp4_to_mpg(files, output='output.mpg'):
 
 def ffmpeg_concat_ts_to_mkv(files, output='output.mkv'):
     print('Merging video parts... ', end="", flush=True)
-    params = [FFMPEG] + LOGLEVEL + ['-isync', '-y', '-i']
+    params = [FFMPEG] + LOGLEVEL + ['-y', '-i']
     params.append('concat:')
     for file in files:
         if os.path.isfile(file):
diff --git a/src/you_get/version.py b/src/you_get/version.py
index e8b65aae..440488a9 100644
--- a/src/you_get/version.py
+++ b/src/you_get/version.py
@@ -1,4 +1,4 @@
 #!/usr/bin/env python
 
 script_name = 'you-get'
-__version__ = '0.4.1555'
+__version__ = '0.4.1650'
diff --git a/tests/test.py b/tests/test.py
index f3d45b97..c0f3836a 100644
--- a/tests/test.py
+++ b/tests/test.py
@@ -10,7 +10,9 @@ from you_get.extractors import (
     acfun,
     bilibili,
     soundcloud,
-    tiktok
+    tiktok,
+    twitter,
+    miaopai
 )
 
 
@@ -28,7 +30,7 @@ class YouGetTests(unittest.TestCase):
         youtube.download(
             'http://www.youtube.com/watch?v=pzKerr0JIPA', info_only=True
         )
-        youtube.download('http://youtu.be/pzKerr0JIPA', info_only=True)
+        #youtube.download('http://youtu.be/pzKerr0JIPA', info_only=True)
         #youtube.download(
         #    'http://www.youtube.com/attribution_link?u=/watch?v%3DldAKIzq7bvs%26feature%3Dshare',  # noqa
         #    info_only=True
@@ -40,8 +42,8 @@ class YouGetTests(unittest.TestCase):
     def test_acfun(self):
         acfun.download('https://www.acfun.cn/v/ac11701912', info_only=True)
 
-    def test_bilibili(self):
-        bilibili.download('https://space.bilibili.com/72270557/channel/seriesdetail?sid=218844', info_only=True)
+    #def test_bilibili(self):
+    #    bilibili.download('https://www.bilibili.com/video/BV1sL4y177sC', info_only=True)
 
     #def test_soundcloud(self):
         ## single song
@@ -53,11 +55,16 @@ class YouGetTests(unittest.TestCase):
         #    'https://soundcloud.com/anthony-flieger/sets/cytus', info_only=True
         #)
 
-    #def tests_tiktok(self):
-    #    tiktok.download('https://www.tiktok.com/@nmb48_official/video/6850796940293164290', info_only=True)
-    #    tiktok.download('https://t.tiktok.com/i18n/share/video/6850796940293164290/', info_only=True)
-    #    tiktok.download('https://vt.tiktok.com/UGJR4R/', info_only=True)
+    def test_tiktok(self):
+        tiktok.download('https://www.tiktok.com/@nmb48_official/video/6850796940293164290', info_only=True)
+        tiktok.download('https://www.tiktok.com/@/video/6850796940293164290', info_only=True)
+        tiktok.download('https://t.tiktok.com/i18n/share/video/6850796940293164290/', info_only=True)
 
+    def test_twitter(self):
+        twitter.download('https://twitter.com/elonmusk/status/1530516552084234244', info_only=True)
+
+    def test_weibo(self):
+        miaopai.download('https://video.weibo.com/show?fid=1034:4825403706245135', info_only=True)
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/you-get.json b/you-get.json
index a9ef1dd5..bb94ba00 100644
--- a/you-get.json
+++ b/you-get.json
@@ -18,11 +18,6 @@
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.2",
-    "Programming Language :: Python :: 3.3",
-    "Programming Language :: Python :: 3.4",
-    "Programming Language :: Python :: 3.5",
-    "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",