$ youtube-dl information WARNING: unable to extract uploader

[guerin]

$ youtube-dl https://youtu.be/yca6UsllwYs
[youtube] yca6UsllwYs: Downloading webpage
[youtube] yca6UsllwYs: Downloading video info webpage
[youtube] yca6UsllwYs: Extracting video information
WARNING: unable to extract uploader nickname
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 797, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
ExtractorError: Cannot identify player u'/yts/jsbin/player-vfliKu3Tk/en_US/base.js'; 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"Cannot identify player u'/yts/jsbin/player-vfliKu3Tk/en_US/base.js'; 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.

[guerin (valereguerin)]

v@v-System2:~$ inxi
CPU~Quad core Intel Core i5-3340 (-MCP-) speed/max~1739/3300 MHz Kernel~4.15.0-29-generic x86_64 Up~1:07 Mem~2194.2/7632.9MB HDD~1002.2GB(16.6% used) Procs~217 Client~Shell inxi~2.2.35
v@v-System2:~$ uname -a
Linux v-System2 4.15.0-29-generic #31~16.04.1-Ubuntu SMP Wed Jul 18 08:54:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
v@v-System2:~$ Full upgrade...