diff --git a/src/you_get/extractors/bilibili.py b/src/you_get/extractors/bilibili.py
index e5abccab..046d2cb1 100644
--- a/src/you_get/extractors/bilibili.py
+++ b/src/you_get/extractors/bilibili.py
@@ -23,7 +23,7 @@ from .youku import youku_download_by_vid
 class Bilibili(VideoExtractor):
     name = 'Bilibili'
     live_api = 'http://live.bilibili.com/api/playurl?cid={}&otype=json'
-    api_url = 'http://interface.bilibili.com/playurl?'
+    api_url = 'http://interface.bilibili.com/v2/playurl?'
     bangumi_api_url = 'http://bangumi.bilibili.com/player/web_api/playurl?'
     live_room_init_api_url = 'https://api.live.bilibili.com/room/v1/Room/room_init?id={}'
     live_room_info_api_url = 'https://api.live.bilibili.com/room/v1/Room/get_info?room_id={}'
diff --git a/src/you_get/extractors/qq.py b/src/you_get/extractors/qq.py
index 89dd7b61..7b1a6860 100644
--- a/src/you_get/extractors/qq.py
+++ b/src/you_get/extractors/qq.py
@@ -47,6 +47,9 @@ def qq_download_by_vid(vid, title, output_dir='.', merge=True, info_only=False):
             else:
                 log.w(key_json['msg'])
             break
+        if key_json.get('filename') is None:
+            log.w(key_json['msg'])
+            break
 
         part_urls.append(url)
         _, ext, size = url_info(url)
@@ -121,18 +124,6 @@ def qq_download(url, output_dir='.', merge=True, info_only=False, **kwargs):
             qq_download_by_vid(vid, vid, output_dir, merge, info_only)
         return
 
-    #do redirect
-    if 'v.qq.com/page' in url:
-        # for URLs like this:
-        # http://v.qq.com/page/k/9/7/k0194pwgw97.html
-        new_url = url_locations([url])[0]
-        if url == new_url:
-            #redirect in js?
-            content = get_content(url)
-            url = match1(content,r'window\.location\.href="(.*?)"')
-        else:
-            url = new_url
-
     if 'kuaibao.qq.com' in url or re.match(r'http://daxue.qq.com/content/content/id/\d+', url):
         content = get_content(url)
         vid = match1(content, r'vid\s*=\s*"\s*([^"]+)"')
diff --git a/src/you_get/extractors/youku.py b/src/you_get/extractors/youku.py
index 099552cf..bc4d8088 100644
--- a/src/you_get/extractors/youku.py
+++ b/src/you_get/extractors/youku.py
@@ -78,7 +78,7 @@ class Youku(VideoExtractor):
         self.api_error_code = None
         self.api_error_msg = None
 
-        self.ccode = '0507'
+        self.ccode = '0590'
         self.utid = None
 
     def youku_ups(self):
diff --git a/src/you_get/extractors/youtube.py b/src/you_get/extractors/youtube.py
index 31835362..33dc470e 100644
--- a/src/you_get/extractors/youtube.py
+++ b/src/you_get/extractors/youtube.py
@@ -366,14 +366,22 @@ class YouTube(VideoExtractor):
                                 dash_url += '&signature={}'.format(sig)
                             dash_size = stream['clen']
                             itag = stream['itag']
+                            audio_url = None
+                            audio_size = None
+                            try:
+                                audio_url = dash_webm_a_url
+                                audio_size = int(dash_webm_a_size)
+                            except UnboundLocalError as e:
+                                audio_url = dash_mp4_a_url
+                                audio_size = int(dash_mp4_a_size)
                             self.dash_streams[itag] = {
                                 'quality': stream['size'],
                                 'itag': itag,
                                 'type': mimeType,
                                 'mime': mimeType,
                                 'container': 'webm',
-                                'src': [dash_url, dash_webm_a_url],
-                                'size': int(dash_size) + int(dash_webm_a_size)
+                                'src': [dash_url, audio_url],
+                                'size': int(dash_size) + int(audio_size)
                             }
 
     def extract(self, **kwargs):