can't download the youtube video

[biggbuddy]

$ youtube-dl --verbose https://www.youtube.com/watch\?v\=D6MY7T0JZKw
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-v', u'--proxy', u'http://127.0.0.1:8118', u'--verbose', u'https://www.youtube.com/watch?v=D6MY7T0JZKw']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.10.07
[debug] Python version 2.7.10 - Darwin-16.4.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.2.2, ffprobe 3.2.2
[debug] Proxy map: {u'http': u'http://127.0.0.1:8118', u'https': u'http://127.0.0.1:8118'}
[youtube] D6MY7T0JZKw: Downloading webpage
[youtube] D6MY7T0JZKw: Downloading video info webpage
[youtube] D6MY7T0JZKw: Extracting video information
[youtube] {43} signature length 42.40, html5 player en_US-vfl8LqiZp
[youtube] D6MY7T0JZKw: Downloading player /yts/jsbin/player-en_US-vfl8LqiZp/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1005, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 919, in _extract_signature_function
    errnote='Download of %s failed' % player_url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 516, in _download_webpage
    res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal, encoding=encoding, data=data, headers=headers, query=query)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 423, in _download_webpage_handle
    urlh = self._request_webpage(url_or_request, video_id, note, errnote, fatal, data=data, headers=headers, query=query)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 403, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2001, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 423, in open
    protocol = req.get_type()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 285, in get_type
    raise ValueError, "unknown url type: %s" % self.__original
ValueError: unknown url type: /yts/jsbin/player-en_US-vfl8LqiZp/base.js
 (caused by ValueError(u'unknown url type: /yts/jsbin/player-en_US-vfl8LqiZp/base.js',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1005, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 919, in _extract_signature_function
    errnote='Download of %s failed' % player_url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 516, in _download_webpage
    res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal, encoding=encoding, data=data, headers=headers, query=query)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 423, in _download_webpage_handle
    urlh = self._request_webpage(url_or_request, video_id, note, errnote, fatal, data=data, headers=headers, query=query)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 403, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2001, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 423, in open
    protocol = req.get_type()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 285, in get_type
    raise ValueError, "unknown url type: %s" % self.__original
ValueError: unknown url type: /yts/jsbin/player-en_US-vfl8LqiZp/base.js
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 694, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 356, in extract
    return self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1584, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1015, in _decrypt_signature
    'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1005, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 919, in _extract_signature_function
    errnote='Download of %s failed' % player_url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 516, in _download_webpage
    res = self._download_webpage_handle(url_or_request, video_id, note, errnote, fatal, encoding=encoding, data=data, headers=headers, query=query)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 423, in _download_webpage_handle
    urlh = self._request_webpage(url_or_request, video_id, note, errnote, fatal, data=data, headers=headers, query=query)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 403, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2001, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 423, in open
    protocol = req.get_type()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 285, in get_type
    raise ValueError, "unknown url type: %s" % self.__original
ValueError: unknown url type: /yts/jsbin/player-en_US-vfl8LqiZp/base.js
 (caused by ValueError(u'unknown url type: /yts/jsbin/player-en_US-vfl8LqiZp/base.js',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

** The other video links are fine **

[dstftw]

You are using an outdated version of youtube-dl. Read this FAQ entry if you have troubles updating.

[biggbuddy]

yes, after sudo youtube-dl -U, it work fine. Thanks!