Pierre Neidhardt wrote:
> As far as I know, youtube-dl is used as a backend for mpv.

Yup.  (It's even an absolute store reference now.)

> Not sure about youtube-viewer.

It doesn't refer to ytdl, and the pure environment, at least, 
doesn't propagate ytdl, so I don't *think* it's used here.

Kind regards,

T G-R