YouTube `shared?ci=video_id` link no longer working

[Khang-NT]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.09.15. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2017.09.15

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• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

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• Bug report (encountered problems with youtube-dl)
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youtube-dl -j 'https://www.youtube.com/shared?ci=8A940MXKFmQ' -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-j', u'https://www.youtube.com/shared?ci=8A940MXKFmQ', u'-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.09.15
[debug] Python version 2.7.10 - Darwin-16.7.0-x86_64-i386-64bit
[debug] exe versions: none
[debug] Proxy map: {}
ERROR: Unable to extract YouTube video id; 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 "/Library/Python/2.7/site-packages/youtube_dl/YoutubeDL.py", line 776, in extract_info
    ie_result = ie.extract(url)
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/common.py", line 434, in extract
    ie_result = self._real_extract(url)
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 2070, in _real_extract
    'videoId', webpage, 'YouTube video id', fatal=True)
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/common.py", line 927, in _html_search_meta
    html, display_name, fatal=fatal, group='content', **kwargs)
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/common.py", line 806, in _html_search_regex
    res = self._search_regex(pattern, string, name, default, fatal, flags, group)
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/common.py", line 797, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract YouTube video id; 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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Description of your issue, suggested solution and other information

I look like YouTube required authentication to watch shared videos now.

[Khang-NT]

YouTube Shared video links are all dead. This issue isn't bug anymore, and consider to remove YoutubeSharedVideoIE.

[ghost]

The shared YouTube URLs work again now, so I think it'll need to be re-added to youtube-dl.