PS C:\Users\USER> youtube-dl.exe -v ytdl://jell.yfish.us/media/jellyfish-3-mbps-hd-hevc-10bit.mkv
[debug] System config: []
[debug] User config: ['--user-agent', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0', '--cookies', 'cookies.txt', '--format', 'bestvideo[height<=?1080]+bestaudio/bestvideo+bestaudio/best']
[debug] Custom config: []
[debug] Command-line args: ['-v', 'ytdl://jell.yfish.us/media/jellyfish-3-mbps-hd-hevc-10bit.mkv']
[debug] Encodings: locale cp65001, fs mbcs, out cp65001, pref cp65001
[debug] youtube-dl version 2021.01.16
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.19041
[debug] exe versions: ffmpeg 4.3.1
[debug] Proxy map: {}
[generic] jellyfish-3-mbps-hd-hevc-10bit: Requesting header
WARNING: Could not send HEAD request to ytdl://jell.yfish.us/media/jellyfish-3-mbps-hd-hevc-10bit.mkv: <urlopen error unknown url type: ytdl>
[generic] jellyfish-3-mbps-hd-hevc-10bit: Downloading webpage
ERROR: Unable to download webpage: <urlopen error unknown url type: ytdl> (caused by URLError('unknown url type: ytdl',))
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfnvjp7pc\build\youtube_dl\extractor\common.py", line 632, in _request_webpage
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpfnvjp7pc\build\youtube_dl\YoutubeDL.py", line 2274, in urlopen
  File "C:\Python\Python34\lib\urllib\request.py", line 464, in open
  File "C:\Python\Python34\lib\urllib\request.py", line 487, in _open
  File "C:\Python\Python34\lib\urllib\request.py", line 442, in _call_chain
  File "C:\Python\Python34\lib\urllib\request.py", line 1253, in unknown_open