ERROR: Signature extraction failed: Traceback

[beskhu3epnm]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.01.24
• 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 bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
    video_id, player_url, s
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
    cache_res = res(test_string)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py", line 1356, in <lambda>
    return lambda s: initial_function([s])
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 258, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
    m.group('expr'), local_vars, allow_recursion - 1)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
    m.group('x'), local_vars, allow_recursion - 1)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
    raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[1376500448,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError("Unsupported JS expression '[1376500448,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how 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; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
    video_id, player_url, s
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
    cache_res = res(test_string)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/extractor/youtube.py", line 1356, in <lambda>
    return lambda s: initial_function([s])
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 258, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
    m.group('expr'), local_vars, allow_recursion - 1)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
    m.group('x'), local_vars, allow_recursion - 1)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/home/user/.local/lib/python3.6/site-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
    raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[1376500448,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError("Unsupported JS expression '[1376500448,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how 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; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

Description

I received two ERROR messages when downloading the titles and IDs from a YouTube channel of 186 videos. Two videos were not processed.