It works, but not well enough on Apple TV. Autoplay doesn’t always work, the navigation is clunky, and having to always toggle different player/modes to get things to only sometimes work is not ideal for kids. The Plex app is mpv based and has worked with everything I’ve thrown at it so it’s the better free solution.

Have had the same issues, so following for answers.

My best free solution at the moment is to just use the Plex app on Apple TV.