Thank you! I will try it out. Probably it takes some time to process the information.
The videos I tried on MPV player all have several subtitle files so this part should be ok.
There must be an error between the link of MPV and Chrome. That could be the script or the texthooker page. Don’t know, maybe it’s easier to just switch to another player as you said.
I don´t know where exactly it would fall, but kawaiiNihongo und kawaiiDungeon for Android. Both are free. kawaiiNihongo teaches and repeats and kawaiiDungeon mainly repeats.