403 issue: welt.de

[ctshh]

• I've verified and I assure that I'm running youtube-dl 2017.08.18
• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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$ youtube-dl -v "https://www.welt.de/mediathek/reportage/technik-und-wissen/video157459931/Harmony-Of-The-Seas-Das-groesste-Kreuzfahrtschiff-der-Welt.html"
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.welt.de/mediathek/reportage/technik-und-wissen/video157459931/Harmony-Of-The-Seas-Das-groesste-Kreuzfahrtschiff-der-Welt.html']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.08.18
[debug] Python version 2.7.10 - Darwin-16.7.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.3.3, ffprobe 3.3.3, rtmpdump 2.4
[debug] Proxy map: {}
[generic] Harmony-Of-The-Seas-Das-groesste-Kreuzfahrtschiff-der-Welt: Requesting header
WARNING: Falling back on generic information extractor.
[generic] Harmony-Of-The-Seas-Das-groesste-Kreuzfahrtschiff-der-Welt: Downloading webpage
[generic] Harmony-Of-The-Seas-Das-groesste-Kreuzfahrtschiff-der-Welt: Extracting information
[generic] Harmony-Of-The-Seas-Das-groesste-Kreuzfahrtschiff-der-Welt: Downloading m3u8 information
ERROR: Failed to download m3u8 information: HTTP Error 403: Forbidden (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 "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 502, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2168, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 437, in open
    response = meth(req, response)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 550, in http_response
    'http', request, response, code, msg, hdrs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 475, in error
    return self._call_chain(*args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 558, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

https://www.welt.de/mediathek/reportage/technik-und-wissen/video157459931/Harmony-Of-The-Seas-Das-groesste-Kreuzfahrtschiff-der-Welt.html

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The download does not start, ends with an error. Same URL works in a browser.

Thank you for looking into this.