error download with verbose output

[irfji]

youtube-dl -x https://youtu.be/lVf9ueCyx48 --verbose
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-x', 'https://youtu.be/lVf9ueCyx48', '--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.09.28
[debug] Python version 3.7.5 (CPython) - Linux-5.3.0-40-generic-x86_64-with-Ubuntu-19.10-eoan
[debug] exe versions: ffmpeg 4.1.4-1build2, ffprobe 4.1.4-1build2, phantomjs 2.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] lVf9ueCyx48: Downloading webpage
[youtube] lVf9ueCyx48: Downloading video info webpage
[youtube] {18} signature length 110, html5 player vfle4a9aa
[youtube] lVf9ueCyx48: Downloading player https://www.youtube.com/yts/jsbin/player_ias-vfle4a9aa/en_US/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
cache_res = res(test_string)
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1356, in
return lambda s: initial_function([s])
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 258, in resf
res, abort = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
m.group('expr'), local_vars, allow_recursion - 1)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
m.group('x'), local_vars, allow_recursion - 1)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[522481285,'; 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 '[522481285,'; 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.
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
cache_res = res(test_string)
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1356, in
return lambda s: initial_function([s])
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 258, in resf
res, abort = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
m.group('expr'), local_vars, allow_recursion - 1)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
m.group('x'), local_vars, allow_recursion - 1)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[522481285,'; 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.
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
cache_res = res(test_string)
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1356, in
return lambda s: initial_function([s])
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 258, in resf
res, abort = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
m.group('expr'), local_vars, allow_recursion - 1)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
m.group('x'), local_vars, allow_recursion - 1)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[522481285,'; 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.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/youtube_dl/YoutubeDL.py", line 796, in extract_info
ie_result = ie.extract(url)
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py", line 530, in extract
ie_result = self._real_extract(url)
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 2043, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1390, in _decrypt_signature
'Signature extraction failed: ' + tb, cause=e)
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
cache_res = res(test_string)
File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py", line 1356, in
return lambda s: initial_function([s])
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 258, in resf
res, abort = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
m.group('expr'), local_vars, allow_recursion - 1)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
m.group('x'), local_vars, allow_recursion - 1)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python3/dist-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[522481285,'; 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 '[522481285,'; 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.