[Kiro]

Does it have a "Download subtitles" function, as in MPC-HC?

[smnc]

Like dombili said, you can integrate Subliminal. One of the nice things about mpv is that it's lua-scriptable.

Here's a rough version of my script: https://github.com/smnx/mpv-autosub (forked from https://gist.github.com/selsta/ce3fb37e775dbd15c698).

[dombili]

mpv is barebones so it doesn't, but you can integrate Subliminal (https://github.com/Diaoul/subliminal) to it.