HTTP not supported when downloading from YouTube

[xavierliwei]

Traceback (most recent call last):
File "/Users/weili/Library/Python/3.8/bin/sound-down", line 8, in
sys.exit(main())
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/click/core.py", line 722, in call
return self.main(*args, **kwargs)
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/sound_downloader/scripts/sound_down.py", line 19, in main
downloader.download_audios()
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/sound_downloader/downloader.py", line 52, in download_audios
video = pafy.new(link)
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/pafy/pafy.py", line 125, in new
return Pafy(url, basic, gdata, signature, size, callback, ydl_opts)
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/pafy/backend_youtube_dl.py", line 29, in init
super(YtdlPafy, self).init(*args, **kwargs)
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/pafy/backend_shared.py", line 95, in init
self._fetch_basic()
File "/Users/weili/Library/Python/3.8/lib/python/site-packages/pafy/backend_youtube_dl.py", line 41, in _fetch_basic
raise IOError(str(e).replace('YouTube said', 'Youtube says'))
OSError: ERROR: ye4jAQ0uxcQ: Youtube says: HTTP is not supported.

[cwienands1]

I found a similar issue reported on another YouTube-related project: mps-youtube/yewtube#986

Looks like the pafy library is the problem, and the issue is fixed in a later version. I quote:

For anyone still facing this problem, upgrade your pafy to v0.5.5 or greater with:
$ pip3 install pafy -U

Unfortunately this didn't work for me (pip upgraded pafy to 0.5.5). Now I am getting the error message
OSError: ERROR: 39svBN954-M: Youtube says: Invalid parameters.