outdated version of youtube-dl

[Murilo Hallgren]

youtube-dl https://www.youtube.com/watch?v=cO-Mj1pgwVI --verbose
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['https://www.youtube.com/watch?v=cO-Mj1pgwVI',
'--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.03.14
[debug] Python version 3.6.8 (CPython) -
Linux-4.15.0-58-generic-x86_64-with-Ubuntu-18.04-bionic
[debug] exe versions: ffmpeg 3.4.6-0ubuntu0.18.04.1, ffprobe
3.4.6-0ubuntu0.18.04.1, phantomjs ., rtmpdump 2.4
[debug] Proxy map: {}
[youtube] cO-Mj1pgwVI: Downloading webpage
[youtube] cO-Mj1pgwVI: Downloading video info webpage
WARNING: Unable to extract video title
[youtube] cO-Mj1pgwVI: Extracting video information
ERROR: Unable to extract uploader name; 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/YoutubeDL.py", line 785,
in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/common.py",
line 440, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3/dist-packages/youtube_dl/extractor/youtube.py",
line 1704, in _real_extract
    raise ExtractorError('Unable to extract uploader name')
youtube_dl.utils.ExtractorError: Unable to extract uploader name; 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.
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