I generally don't use VLC since it caused interpolation on videos where it should not. I think I use mpv with some front end when needed. But for a while it is "set and forget" for me 😅
So I stuck to default theme, knowing it ruined my colourscheme.
Now, I'm on MPV and everything works perfectly, except that I need to run it from a terminal because I really can't be bothered to do a drag n drop of a file into the mpv window. I'd recommend using mpv with window swallowing enabled for your terminal.