Signature extraction failed for JS player

[czoka]

Command

youtube-dl -v https://youtu.be/r4cunxWkwxo?t=80

LOG

C:\Users\User>youtube-dl -v https://youtu.be/r4cunxWkwxo?t=80
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://youtu.be/r4cunxWkwxo?t=80']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2018.09.01
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.17134
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] r4cunxWkwxo: Downloading webpage
[youtube] r4cunxWkwxo: Downloading video info webpage
[youtube] {22} signature length 41.42, html5 player vflvABTsY
[youtube] r4cunxWkwxo: Downloading player https://www.youtube.com/yts/jsbin/player-vflvABTsY/en_US/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1210, in _decrypt_signature
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1121, in _extract_signature_function
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1182, in _parse_sig_js
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\common.py", line 972, in _search_regex
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by RegexNotFoundError('Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1210, in _decrypt_signature
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1121, in _extract_signature_function
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1182, in _parse_sig_js
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\common.py", line 972, in _search_regex
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1210, in _decrypt_signature
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1121, in _extract_signature_function
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1182, in _parse_sig_js
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\common.py", line 972, in _search_regex
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\YoutubeDL.py", line 792, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\common.py", line 502, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1803, in _real_extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1220, in _decrypt_signature
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1210, in _decrypt_signature
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1121, in _extract_signature_function
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\youtube.py", line 1182, in _parse_sig_js
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpkzpz548c\build\youtube_dl\extractor\common.py", line 972, in _search_regex
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by RegexNotFoundError('Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[Akhlys]

Duplicate of #17457
(had another title a short time ago, nearly made a new ticket myself)

[czoka]

I think I've searched for the issue before that was posted. It took a while to look through all the steps to check before submitting it 😛 . Will close this and +1 that.