Tele5.de some videos not downloadable

[RavenRabbit]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.05.29
• 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

% youtube-dl -v "https://www.tele5.de/filme/ghoul-das-geheimnis-des-friedhofmonsters/"
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.tele5.de/filme/ghoul-das-geheimnis-des-friedhofmonsters/']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.05.29
[debug] Python version 3.7.3 (CPython) - Linux-4.19.0-6-amd64-x86_64-with-debian-10.4
[debug] exe versions: ffmpeg 4.1.4-1, ffprobe 4.1.4-1
[debug] Proxy map: {}
[Tele5] ghoul-das-geheimnis-des-friedhofmonsters: Downloading webpage
[Tele5] ghoul-das-geheimnis-des-friedhofmonsters: Downloading JSON metadata
[Nexx] 1682279: Downloading JSON metadata
[Nexx] 1682279: Downloading session/init JSON
ERROR: An extractor error has occurred. (caused by KeyError('clienttoken')); 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 "/home/tux/youtube-dl/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/home/tux/youtube-dl/lib/python3.7/site-packages/youtube_dl/extractor/nexx.py", line 351, in _real_extract
    secret = result['device']['clienttoken'][int(device_id[0]):]
KeyError: 'clienttoken'
Traceback (most recent call last):
  File "/home/tux/youtube-dl/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/home/tux/youtube-dl/lib/python3.7/site-packages/youtube_dl/extractor/nexx.py", line 351, in _real_extract
    secret = result['device']['clienttoken'][int(device_id[0]):]
KeyError: 'clienttoken'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/tux/youtube-dl/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 797, in extract_info
    ie_result = ie.extract(url)
  File "/home/tux/youtube-dl/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 543, in extract
    raise ExtractorError('An extractor error has occurred.', cause=e)
youtube_dl.utils.ExtractorError: An extractor error has occurred. (caused by KeyError('clienttoken')); 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

While most videos work fine, downloading some video like https://www.tele5.de/filme/ghoul-das-geheimnis-des-friedhofmonsters/ result in the error listed above.

For testing, be aware that this specific video is only available at certain times throughout the day.