mpv but this is not good to manage, the elements for stop, start and slider are to small.
Did you try with Celluloid (formerly GNOME MPV) ?
I did, but the picture is lookind somewhat blue where it should be white.
Not sure if you saw my demo here:
That was when I was still on
amber. Don’t know if it’s better with
byzantium; I haven’t tested.
VLC flatpak was pretty good on
amber: VLC (flatpak version) on L5
how about select ‘Settings’ -> ‘Display’ -> set ‘Scale’ to 100% -> ‘Apply’ ?