Failing to download youtube playlist

[rakeshjain]

youtube-dl --verbose https://www.youtube.com/playlist?list=PLAM7IOZnvD2Hcb8RtSFXCaEomdg-FWQcb
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/playlist?list=PLAM7IOZnvD2Hcb8RtSFXCaEomdg-FWQcb']
[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-3.13.0-32-generic-x86_64-with-Ubuntu-14.04-trusty
[debug] Proxy map: {}
[youtube:playlist] PLAM7IOZnvD2Hcb8RtSFXCaEomdg-FWQcb: Downloading page #1
WARNING: [youtube:playlist] PLAM7IOZnvD2Hcb8RtSFXCaEomdg-FWQcb: 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'

(.?)

', 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]

You are using an outdated version of youtube-dl. YouTube changed their playlists in April 2014 and their player afterwards, so we recommend at least youtube-dl version 2014.07.25.

It looks like you installed youtube-dl with a package manager (something like apt-get, or pip). You can use that package manager to update youtube-dl (you may need to contact the package maintainer though, and request an update).

Alternatively, uninstall the youtube package and follow our manual installation instructions. From then on, you'll be able to update with sudo youtube-dl -U.