6play: "HTTP Error 404: Not Found"

[ThibaudDauce]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.10.29
• 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 issues including closed ones

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['https://www.6play.fr/le-meilleur-patissier-p_1807/monstres-et-patisserie--c_12539241', '-F', '--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.10.29
[debug] Python version 3.7.4 (CPython) - Linux-5.3.7-arch1-2-ARCH-x86_64-with-arch
[debug] exe versions: ffmpeg 4.2.1, ffprobe 4.2.1, rtmpdump 2.4
[debug] Proxy map: {}
[6play] 12539241: Downloading JSON metadata
[6play] 12539241: Downloading webpage
[6play] 12539241: Downloading m3u8 information
WARNING: Failed to download m3u8 information: HTTP Error 404: Not Found
[6play] 12539241: Downloading MPD manifest
WARNING: Failed to download MPD manifest: HTTP Error 404: Not Found
[6play] 12539241: Downloading m3u8 information
WARNING: Failed to download m3u8 information: HTTP Error 404: Not Found
[6play] 12539241: Downloading MPD manifest
WARNING: Failed to download MPD manifest: HTTP Error 404: Not Found
[6play] 12539241: Downloading m3u8 information
WARNING: Failed to download m3u8 information: HTTP Error 404: Not Found
[6play] 12539241: Downloading MPD manifest
WARNING: Failed to download MPD manifest: HTTP Error 404: Not Found
ERROR: No video formats found; 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 "/usr/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 796, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/sixplay.py", line 113, in _real_extract
    self._sort_formats(formats)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 1327, in _sort_formats
    raise ExtractorError('No video formats found')
youtube_dl.utils.ExtractorError: No video formats found; 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.

Description

Since a few days, 6play seems to return 404 for some youtube-dl requests (request to download, request to show the formats…).
I tried with a few new videos :

• [WORKS] https://www.6play.fr/instinct-p_14823/saison-2-episode-2-c_12537043
• [WORKS] https://www.6play.fr/en-route-pour-le-meilleur-patissier-p_15245/episode-1-c_12536205
• [FAILS] https://www.6play.fr/le-meilleur-patissier-p_1807/monstres-et-patisserie--c_12539241
• [FAILS] https://www.6play.fr/objectif-top-chef-p_4454/semaine-1-journee-3-c_12538535
• [WORKS] https://www.6play.fr/zone-interdite-p_845/le-retour-a-l-ecole-a-l-ancienne-c_11759920

Thanks!