steam game demo video download dose not work anymore

[warichnict]

$ youtube-dl --write-info-json https://store.steampowered.com/app/9900/Star_Trek_Online/
[Steam] 9900: Downloading webpage
ERROR: Unable to extract flash vars; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
treaki@ttpdeb03:/tmp/ytdl$ youtube-dl --write-info-json https://store.steampowered.com/app/9900/Star_Trek_Online/ --verbose
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'--write-info-json', u'https://store.steampowered.com/app/9900/Star_Trek_Online/', u'--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.06.16.1
[debug] Python version 2.7.16 (CPython) - Linux-4.19.0-8-amd64-x86_64-with-debian-10.3
[debug] exe versions: ffmpeg 4.1.4-1, ffprobe 4.1.4-1, phantomjs 5, rtmpdump 2.4
[debug] Proxy map: {}
[Steam] 9900: Downloading webpage
ERROR: Unable to extract flash vars; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/home/treaki/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 797, in extract_info
    ie_result = ie.extract(url)
  File "/home/treaki/bin/youtube-dl/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/home/treaki/bin/youtube-dl/youtube_dl/extractor/steam.py", line 90, in _real_extract
    'flash vars'), playlist_id, js_to_json)
  File "/home/treaki/bin/youtube-dl/youtube_dl/extractor/common.py", line 1005, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract flash vars; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.