diff --git a/src/you_get/downloader/youtube.py b/src/you_get/downloader/youtube.py
index 7eecd778..fc355833 100644
--- a/src/you_get/downloader/youtube.py
+++ b/src/you_get/downloader/youtube.py
@@ -38,16 +38,18 @@ def decrypt_signature(s):
         return s[25] + s[3:25] + s[0] + s[26:42] + s[79] + s[43:79] + s[91] + s[80:83]
     elif len(s) == 90:
         return s[25] + s[3:25] + s[2] + s[26:40] + s[77] + s[41:77] + s[89] + s[78:81]
+    elif len(s) == 89:
+        return s[84:78:-1] + s[87] + s[77:60:-1] + s[0] + s[59:3:-1]
     elif len(s) == 88:
         return s[48] + s[81:67:-1] + s[82] + s[66:62:-1] + s[85] + s[61:48:-1] + s[67] + s[47:12:-1] + s[3] + s[11:3:-1] + s[2] + s[12]
     elif len(s) == 87:
-        return s[4:23] + s[86] + s[24:85]
+        return s[83:53:-1] + s[3] + s[52:40:-1] + s[86] + s[39:10:-1] + s[0] + s[9:3:-1] + s[53]
     elif len(s) == 86:
-        return s[83:85] + s[26] + s[79:46:-1] + s[85] + s[45:36:-1] + s[30] + s[35:30:-1] + s[46] + s[29:26:-1] + s[82] + s[25:1:-1]
+        return s[5:20] + s[2] + s[21:]
     elif len(s) == 85:
         return s[2:8] + s[0] + s[9:21] + s[65] + s[22:65] + s[84] + s[66:82] + s[21]
     elif len(s) == 84:
-        return s[83:36:-1] + s[2] + s[35:26:-1] + s[3] + s[25:3:-1] + s[26]
+        return s[83:27:-1] + s[0] + s[26:5:-1] + s[2:0:-1] + s[27]
     elif len(s) == 83:
         return s[:15] + s[80] + s[16:80] + s[15]
     elif len(s) == 82: