Download fails with "HTTPError: HTTP Error 500: Internal Server Error" on valid download url

[JasonGross]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.02.07. 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 Issues with outdated version will be rejected.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 2017.02.07

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• At least skimmed through README and most notably 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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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

$ youtube-dl -v --no-post-overwrites  -w -x --audio-format vorbis https://www.youtube.com/watch?v=rpOwTspdwkI
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'--no-post-overwrites', u'-w', u'-x', u'--audio-format', u'vorbis', u'https://www.youtube.com/watch?v=rpOwTspdwkI']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.02.07
[debug] Python version 2.7.12 - Linux-4.4.0-38-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: ffmpeg 2.8.10-0ubuntu0.16.04.1, ffprobe 2.8.10-0ubuntu0.16.04.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] rpOwTspdwkI: Downloading webpage
[youtube] rpOwTspdwkI: Downloading video info webpage
[youtube] rpOwTspdwkI: Extracting video information
[youtube] rpOwTspdwkI: Downloading MPD manifest
[debug] Invoking downloader on u'https://r1---sn-a8au-cvne.googlevideo.com/videoplayback?id=ae93b04eca5dc242&itag=171&source=youtube&requiressl=yes&mm=31&mn=sn-a8au-cvne&initcwndbps=9528750&ms=au&mv=m&pl=15&pcm2cms=yes&ratebypass=yes&mime=audio/webm&gir=yes&clen=8037794&lmt=1392297776770241&dur=739.081&key=dg_yt0&signature=0930920B7A080C4D8D4494CD03F53B1FFE797414.60DB7E4E00A76A0EFAFD6862AE1FA8A8D05141B6&mt=1486501344&upn=3eJx5k0nILU&ip=128.30.92.103&ipbits=0&expire=1486522987&sparams=ip,ipbits,expire,id,itag,source,requiressl,mm,mn,initcwndbps,ms,mv,pl,pcm2cms,ratebypass,mime,gir,clen,lmt,dur'
[download] Resuming download at byte 6291408
[download] Got server HTTP error. Retrying (attempt 1 of 10)...
[download] Got server HTTP error. Retrying (attempt 2 of 10)...
[download] Got server HTTP error. Retrying (attempt 3 of 10)...
[download] Got server HTTP error. Retrying (attempt 4 of 10)...
[download] Got server HTTP error. Retrying (attempt 5 of 10)...
[download] Got server HTTP error. Retrying (attempt 6 of 10)...
[download] Got server HTTP error. Retrying (attempt 7 of 10)...
[download] Got server HTTP error. Retrying (attempt 8 of 10)...
[download] Got server HTTP error. Retrying (attempt 9 of 10)...
[download] Got server HTTP error. Retrying (attempt 10 of 10)...
ERROR: giving up after 10 retries
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/http.py", line 61, in real_download
    data = self.ydl.urlopen(request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2006, 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)
HTTPError: HTTP Error 500: Internal Server Error
$

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Description of your issue, suggested solution and other information

I expect the dowload of this url to succeed, but it fails.

This seems similar to #3721, except that #3721 (comment) mentions that the download url is invalid and that passing -g gives a KeyError, neither of which occurs for me (the audio plays fine from the download url, and -g does not give any error.)

[dstftw]

Duplicate of #3721.