Signature extraction failed

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[youtube] YBHQbu5rbdQ: Downloading video info webpage [youtube] YBHQbu5rbdQ: Downloading js player vfl7lL1_p ERROR: Signature extraction failed: Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1384, in _decrypt_signature video_id, player_url, s File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1297, in _extract_signature_function cache_res = res(test_string) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1360, in <lambda> return lambda s: initial_function([s]) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 258, in resf res, abort = self.interpret_statement(stmt, local_vars) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement v = self.interpret_expression(expr, local_vars, allow_recursion) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression m.group('expr'), local_vars, allow_recursion - 1) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression m.group('x'), local_vars, allow_recursion - 1) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement v = self.interpret_expression(expr, local_vars, allow_recursion) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression m.group('x'), local_vars, allow_recursion - 1) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement v = self.interpret_expression(expr, local_vars, allow_recursion) File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression raise ExtractorError('Unsupported JS expression %r' % expr) ExtractorError: Unsupported JS expression u'[function(c,d){d=(d'; 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(u"Unsupported JS expression u'[function(c,d){d=(d'; 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. ^C [1]+ Exit 1 youtube-dl --embed-thumbnail --audio-format mp3 https://www.youtube.com/watch?v=YBHQbu5rbdQ