RegexNotFoundError:

[foxsam21]

trying to download a playlist is giving me the following error.

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://www.youtube.com/playlist?list=PLYZU2_LQLk6KUrNGJJBWkmEDz2TTSx1zI', '-v']
[debug] Encodings: locale 'UTF-8', fs 'UTF-8', out 'UTF-8', pref: 'UTF-8'
[debug] youtube-dl version 2014.02.17
[debug] Python version 2.7.6 - Linux-3.13.0-24-generic-x86_64-with-LinuxMint-17-qiana
[debug] Proxy map: {}
WARNING: [youtube:playlist] PLYZU2_LQLk6KUrNGJJBWkmEDz2TTSx1zI: Playlist page is missing OpenGraph title, falling back ...
ERROR: Unable to extract title; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1511, in _real_extract
    playlist_title = self._og_search_title(page)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 428, in _og_search_title
    return self._og_search_property('title', html, **kargs)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 416, in _og_search_property
    escaped = self._search_regex(self._og_regexes(prop), html, name, flags=re.DOTALL, **kargs)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 356, in _search_regex
    raise RegexNotFoundError(u'Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract OpenGraph title; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 493, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 158, in extract
    return self._real_extract(url)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1517, in _real_extract
    r'<h1 class="pl-header-title">(.*?)</h1>', page, u'title')
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 366, in _html_search_regex
    res = self._search_regex(pattern, string, name, default, fatal, flags)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 356, in _search_regex
    raise RegexNotFoundError(u'Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract title; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.

[phihag]

Your version of youtube-dl is heavily outdated (about 300 versions too old). Since it has been released, YouTube has changed their interface about 5 times. See our FAQ if you need help updating.