[ProSiebenMaxx] Goblin Slayer: This video is unavailable

[SebiderSushi]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.05.20
• 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

youtube-dl https://www.prosiebenmaxx.de/anime/goblin-slayer/video/18-staffel-1-episode-8-fluestern-gebete-und-gesaenge-ganze-folge -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'https://www.prosiebenmaxx.de/anime/goblin-slayer/video/18-staffel-1-episode-8-fluestern-gebete-und-gesaenge-ganze-folge', u'-v']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.05.20
[debug] Python version 2.7.12 (CPython) - Linux-4.15.0-50-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: ffmpeg 2.8.15, ffprobe 2.8.15, rtmpdump 2.4
[debug] Proxy map: {}
[prosiebensat1] anime/goblin-slayer/video/18-staffel-1-episode-8-fluestern-gebete-und-gesaenge-ganze-folge: Downloading webpage
[prosiebensat1] 5853876: Downloading videos JSON
[prosiebensat1] 5853876: Downloading sources JSON
[prosiebensat1] 5853876: Downloading urls JSON
ERROR: This video is unavailable
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 796, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 529, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/prosiebensat1.py", line 450, in _real_extract
    return self._extract_clip(url, webpage)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/prosiebensat1.py", line 399, in _extract_clip
    info = self._extract_video_info(url, clip_id)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/prosiebensat1.py", line 71, in _extract_video_info
    raise ExtractorError('This video is unavailable', expected=True)
ExtractorError: This video is unavailable

Description

If trying to download any of the following URLs with youtube-dl it yield the ERROR: This video is unavailable

https://www.prosiebenmaxx.de/anime/goblin-slayer/video/17-staffel-1-episode-7-auf-in-den-tod-ganze-folge
https://www.prosiebenmaxx.de/anime/goblin-slayer/video/18-staffel-1-episode-8-fluestern-gebete-und-gesaenge-ganze-folge
https://www.prosiebenmaxx.de/anime/goblin-slayer/video/19-staffel-1-episode-9-hin-und-zurueck-ganze-folge
https://www.prosiebenmaxx.de/anime/goblin-slayer/video/110-staffel-1-episode-10-schlummer-ganze-folge
https://www.prosiebenmaxx.de/anime/goblin-slayer/video/111-staffel-1-episode-11-ein-festmahl-fuer-abenteurer-ganze-folge
https://www.prosiebenmaxx.de/anime/goblin-slayer/video/111-staffel-1-episode-11-ein-festmahl-fuer-abenteurer-ganze-folge
https://www.prosiebenmaxx.de/anime/goblin-slayer/video/112-preview-folge-12-die-finale-schlacht-gegen-die-goblins-clip

Other videos I have tried download as expected, for example all full episode videos on the following pages:

https://www.prosiebenmaxx.de/anime/blue-exorcist/video
https://www.prosiebenmaxx.de/anime/one-piece/video
https://www.prosiebenmaxx.de/anime/date-a-live/video
https://www.prosiebenmaxx.de/anime/gintama/video
https://www.sat1.de/tv/meine-klasse-voll-das-leben/video

(even if probably unrelated i have included the link from sat1 since it uses the same extractor)

The suggested solution is of course to find the real issue here and to fix the extractor.

[SebiderSushi]

Your response time amazes me. Thank you very much for your work.