[youtube] nsig extraction failed

Checklist

• I’m reporting a broken site
• I’ve verified that I’m running yt-dlp version 2022.01.21. (update instructions)
• I’ve checked that all provided URLs are alive and playable in a browser
• I’ve checked that all URLs and arguments with special characters are properly quoted or escaped
• I’ve searched the bugtracker for similar issues including closed ones. DO NOT post duplicates
• I’ve read the guidelines for opening an issue
• I’ve read about sharing account credentials and I’m willing to share it if required

Region

United States

Description

Download still succeeds, just throttled again.

Verbose log

$ yt-dlp -vU --no-download https://www.youtube.com/watch?v=VzqN4Cn8r3U
[debug] Command-line config: ['-vU', '--no-download', 'https://www.youtube.com/watch?v=VzqN4Cn8r3U']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, err utf-8, pref UTF-8
[debug] yt-dlp version 2022.01.21 [f20d607b0] (zip)
[debug] Python version 3.10.1 (CPython 64bit) - Linux-5.14.21-2-MANJARO-x86_64-with-glibc2.33
[debug] exe versions: ffmpeg 4.4.1 (setts), ffprobe 4.4.1, rtmpdump 2.4
[debug] Optional libraries: Cryptodome, secretstorage, mutagen, sqlite, websockets
[debug] Proxy map: {}
Latest version: 2022.01.21, Current version: 2022.01.21
yt-dlp is up to date (2022.01.21)
[debug] [youtube] Extracting URL: https://www.youtube.com/watch?v=VzqN4Cn8r3U
[youtube] VzqN4Cn8r3U: Downloading webpage
[youtube] VzqN4Cn8r3U: Downloading android player API JSON
[youtube] VzqN4Cn8r3U: Downloading player e06dea74
WARNING: [youtube] nsig extraction failed: You may experience throttling for some formats
n = 2rWZ998KTlsmBLexbl ; player = https://www.youtube.com/s/player/e06dea74/player_ias.vflset/en_US/base.js
VzqN4Cn8r3U: Traceback (most recent call last):
  File "/usr/local/bin/yt-dlp/yt_dlp/extractor/youtube.py", line 2412, in _decrypt_nsig
    self._player_cache[player_id] = self._extract_n_function(video_id, player_url)
  File "/usr/local/bin/yt-dlp/yt_dlp/extractor/youtube.py", line 2433, in _extract_n_function
    funcname = self._extract_n_function_name(jscode)
  File "/usr/local/bin/yt-dlp/yt_dlp/extractor/youtube.py", line 2421, in _extract_n_function_name
    return self._search_regex(
  File "/usr/local/bin/yt-dlp/yt_dlp/extractor/common.py", line 1186, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
yt_dlp.utils.RegexNotFoundError: Unable to extract Initial JS player n function name; please report this issue on  https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; type  yt-dlp -U  to update. Be sure to call yt-dlp with the --verbose flag and include its complete output.
 (caused by RegexNotFoundError('Unable to extract \x1b[0;94mInitial JS player n function name\x1b[0m; please report this issue on  https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; type  yt-dlp -U  to update. Be sure to call yt-dlp with the --verbose flag and include its complete output.')); please report this issue on  https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; type  yt-dlp -U  to update. Be sure to call yt-dlp with the --verbose flag and include its complete output.
[debug] Sort order given by extractor: quality, res, fps, hdr:12, source, codec:vp9.2, lang, proto
[debug] Formats sorted by: hasvid, ie_pref, quality, res, fps, hdr:12(7), source, vcodec:vp9.2(10), acodec, lang, proto, filesize, fs_approx, tbr, vbr, abr, asr, vext, aext, hasaud, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] VzqN4Cn8r3U: Downloading 1 format(s): 315+251

[pukkandan]

@aasdfasdfg The issue is already fixed. You just need to update

[aasdfasdfg]

Sorry for posting on an old issue, and for reporting something on an old version of yt-dlp, but I ran into a similar error just now and I am in a rush - so I can’t do the full due diligence before filing a new issue right now. So I am leaving this comment with enough info to either revisit it later myself, or at the very least leave enough breadcrumbs for someone else in case I don’t get around to that myself.

yt-dlp rMIEPkaadq0
[youtube] rMIEPkaadq0: Downloading webpage
[youtube] rMIEPkaadq0: Downloading android player API JSON
[youtube] rMIEPkaadq0: Downloading player 87b9576a
WARNING: [youtube] nsig extraction failed: You may experience throttling for some formats
n = sSFow21YhNN4l1Fxsx ; player = https://www.youtube.com/s/player/87b9576a/player_ias.vflset/en_US/base.js
rMIEPkaadq0: Traceback (most recent call last):
  File "/usr/local/Cellar/yt-dlp/2021.12.27/libexec/lib/python3.10/site-packages/yt_dlp/extractor/youtube.py", line 2095, in _decrypt_nsig
    self._player_cache[player_id] = self._extract_n_function(video_id, player_url)
  File "/usr/local/Cellar/yt-dlp/2021.12.27/libexec/lib/python3.10/site-packages/yt_dlp/extractor/youtube.py", line 2116, in _extract_n_function
    funcname = self._extract_n_function_name(jscode)
  File "/usr/local/Cellar/yt-dlp/2021.12.27/libexec/lib/python3.10/site-packages/yt_dlp/extractor/youtube.py", line 2104, in _extract_n_function_name
    return self._search_regex(
  File "/usr/local/Cellar/yt-dlp/2021.12.27/libexec/lib/python3.10/site-packages/yt_dlp/extractor/common.py", line 1173, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
yt_dlp.utils.RegexNotFoundError: Unable to extract Initial JS player n function name; please report this issue on  https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; see  https://github.com/yt-dlp/yt-dlp  on how to update. Be sure to call yt-dlp with the --verbose flag and include its complete output.
 (caused by RegexNotFoundError('Unable to extract \x1b[0;94mInitial JS player n function name\x1b[0m; please report this issue on  https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; see  https://github.com/yt-dlp/yt-dlp  on how to update. Be sure to call yt-dlp with the --verbose flag and include its complete output.')); please report this issue on  https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; see  https://github.com/yt-dlp/yt-dlp  on how to update. Be sure to call yt-dlp with the --verbose flag and include its complete output.
[info] rMIEPkaadq0: Downloading 1 format(s): 303+251