One specific Dailymotion url times out

[rtega]

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.05.08
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'--add-metadata', u'-v', u'https://www.dailymotion.com/video/x172ex9']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.05.08
[debug] Python version 2.7.17 (CPython) - Linux-4.15.0-76-generic-x86_64-with-Ubuntu-18.04-bionic
[debug] exe versions: ffmpeg 3.4.6, ffprobe 3.4.6, phantomjs 2.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[dailymotion] Downloading Access Token
[dailymotion] x172ex9: Downloading media JSON metadata
[dailymotion] x172ex9: Downloading metadata JSON
[dailymotion] x172ex9: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on u'https://proxy-033.dc3.dailymotion.com/sec(ZtlhS-L3MzMmVYbz73NVw5JwibHdEeo7Q2sF8emA7w1LndMS-6F-rcChpx7aoBuWl4JeGv5NByIlyBrbnZAsDg)/video/141/633/72336141_mp4_h264_aac_hd.mp4'
ERROR: unable to download video data: <urlopen error [Errno 110] Connection timed out>
Traceback (most recent call last):
  File "/home/rtega/bin/yout/youtube_dl/YoutubeDL.py", line 1926, in process_info
    success = dl(filename, info_dict)
  File "/home/rtega/bin/yout/youtube_dl/YoutubeDL.py", line 1865, in dl
    return fd.download(name, info)
  File "/home/rtega/bin/yout/youtube_dl/downloader/common.py", line 366, in download
    return self.real_download(filename, info_dict)
  File "/home/rtega/bin/yout/youtube_dl/downloader/http.py", line 341, in real_download
    establish_connection()
  File "/home/rtega/bin/yout/youtube_dl/downloader/http.py", line 109, in establish_connection
    ctx.data = self.ydl.urlopen(request)
  File "/home/rtega/bin/yout/youtube_dl/YoutubeDL.py", line 2238, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib/python2.7/urllib2.py", line 429, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 447, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
    result = func(*args)
  File "/home/rtega/bin/yout/youtube_dl/utils.py", line 2730, in https_open
    req, **kwargs)
  File "/usr/lib/python2.7/urllib2.py", line 1205, in do_open
    raise URLError(err)
URLError: <urlopen error [Errno 110] Connection timed out>

zsh: exit 1     yout --add-metadata -v 'https://www.dailymotion.com/video/x172ex9'

Description

I have one url that times out on dailymotion. Everything else seems to work on dailymotion. I can watch it in my browser. If I feed the m3u8 url to youtube-dl it downloads allright:
https://www.dailymotion.com/video/x172ex9
Executing

youtube-dl --rm-cache-dir

doesn't seem to do a thing either so I guess this is some bug.