youtube-dl not able to download playlist

[Dinesh-Mittal]

See the output of the command I am running..

xxxxxxxxxx:~$ youtube-dl https://www.youtube.com/playlist?list=PLOU2XLYxmsII8REpkzsy1bJHj6G1WEVA1 --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://www.youtube.com/playlist?list=PLOU2XLYxmsII8REpkzsy1bJHj6G1WEVA1', '--verbose']
[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-3.13.0-77-generic-x86_64-with-Ubuntu-14.04-trusty
[debug] Proxy map: {'no': 'localhost,.intel.com,127.0.0.0/8,172.16.0.0/20,192.168.0.0/16,10.0.0.0/8'}
[youtube:playlist] PLOU2XLYxmsII8REpkzsy1bJHj6G1WEVA1: Downloading page #1
WARNING: [youtube:playlist] PLOU2XLYxmsII8REpkzsy1bJHj6G1WEVA1: 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 (about 400 versions have been released in the mean time). Since YouTube changed its API in late December 2015, you need a version from this year (preferably the current one) to download all videos. Please refer to our FAQ if you need help updating.