On Tue., Dec. 21, 2021, 19:35 Stefan Monnier, <monnier@iro.umontreal.ca>
wrote:

Not sure what you're referring to: I don't see any `mpv` package in NonGNU
> ELPA.
>

Hah, sorry, I got a little confused by something else. That's right, no mpv
in NonGNU ELPA, so not a problem then. It's not a dependency anyway,
although that does mean that for the best subtitling experience, people
will need to install mpv from that other repository.

... Is the mpv package the sort of thing that might be considered for
inclusion in NonGNU ELPA? :) It would be pretty neat to be able to let
people package-install and get all the useful parts, although they'll still
need to install the actual mpv player separately. (At least until that
Emacs-based video player gets all sorted out...)

> Is it okay for ELPA packages to depend on NonGNU ELPA?
> Yes!
>

Okay, I can try asking the other contributors. Might be a bit of a low
probability, though, but worth a shot.