A big reason I use MPV is because of anime. I forget exactly what the reason was back in the day, but I can remember MPV being better at playing certain formats, and fan subs of anime are early adopters of new codecs. In addition, there is a very healthy ecosystem of plugins related to language learning, which again ties back to anime.
This is exactly what I’ve been using since 2.0. Right before I close the game, I plop one of these down nearby with text reminding me what I’m gonna do next.