[Spiegel] Unable to download JSON metadata with [Nexx]

[ghost]

• [x ] I've verified and I assure that I'm running youtube-dl 2018.02.11

[debug] youtube-dl version 2018.02.11

• [x ] At least skimmed through the README, most notably the FAQ and BUGS sections

• [x ] Searched the bugtracker for similar issues including closed ones

• [x ] Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

• [x ] Bug report (encountered problems with youtube-dl)

Videos$ ./youtube-dl -f mp4 http://www.spiegel.de/video/webvideos-der-woche-sprung-aufs-eistrampolin-video-99013478.html
[Spiegel] 99013478: Downloading webpage
[Nexx] 1274744: Downloading session/init JSON
[Nexx] 1274744: Downloading videos/byid/1274744 JSON
ERROR: Unable to download JSON metadata: HTTP Error 404: Not Found (caused by HTTPError()); 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.
Videos$ ./youtube-dl --verbose -f mp4 http://www.spiegel.de/video/webvideos-der-woche-sprung-aufs-eistrampolin-video-99013478.html
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'--verbose', u'-f', u'mp4', u'http://www.spiegel.de/video/webvideos-der-woche-sprung-aufs-eistrampolin-video-99013478.html']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.02.11
[debug] Python version 2.7.12 (CPython) - Linux-4.4.0-112-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: avconv 2.8.11-0ubuntu0.16.04.1, avprobe 2.8.11-0ubuntu0.16.04.1, ffmpeg 2.8.11-0ubuntu0.16.04.1, ffprobe 2.8.11-0ubuntu0.16.04.1, rtmpdump 2.4
[debug] Proxy map: {}
[Spiegel] 99013478: Downloading webpage
[Nexx] 1274744: Downloading session/init JSON
[Nexx] 1274744: Downloading videos/byid/1274744 JSON
ERROR: Unable to download JSON metadata: HTTP Error 404: Not Found (caused by HTTPError()); 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.
  File "./youtube-dl/youtube_dl/extractor/common.py", line 519, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 2199, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib/python2.7/urllib2.py", line 435, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 548, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 473, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 556, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

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since a few days youtube-dl isn't able to download spiegel.de videos any more. it worked on the according system perfectly before. it's still possible to watch the videos in a browser on the same system. it has been checked with several videos.

[ghost]

verfified with version 2018.02.22: works perfectly

thanks a lot!!