KeyError: 's'

yt = Youtube('https://www.youtube.com/watch?v=dkfW1Q1T72c') This code gives an error：

Traceback (most recent call last): File “views.py”, line 46, in <module> yt = YouTube(url) File “C:\Users\Diego\AppData\Local\Programs\Python\Python37\lib\site-packages\pytube_main_.py”, line 88, in init self.prefetch_init() File “C:\Users\Diego\AppData\Local\Programs\Python\Python37\lib\site-packages\pytube_main_.py”, line 97, in prefetch_init self.init() File “C:\Users\Diego\AppData\Local\Programs\Python\Python37\lib\site-packages\pytube_main_.py”, line 133, in init mixins.apply_signature(self.player_config_args, fmt, self.js) File “C:\Users\Diego\AppData\Local\Programs\Python\Python37\lib\site-packages\pytube\mixins.py”, line 49, in apply_signature signature = cipher.get_signature(js, stream[‘s’]) KeyError: ‘s’

This error occurs for certain URLs but not necessarily. This problem has been bothering me for a long time, please help me solve this problem.（By the way, I am using the latest version.） Thank you!

[kaidokert]

Quick and small workaround for ( what seems to be the most ) of the issue: Change line 41

if ('signature=' in url):

to :

if ('signature=' in url) or ('&sig=' in url) or ('&lsig=' in url):

[heckad]

This video https://www.youtube.com/watch?v=cfsICOzt6Do do not download. Program failing with same error.