I am the current main developper and maintainer Nova Video Player an open source video player for Android. It consists in a fork of the original Archos Video Player Community Edition that is hosted here: https://github.com/nova-video-player/aos-AVP supporting Android O and P and beyond as well as including new features.
The main motivation of this post is to make the Android TV community aware of this effort and also highlight the recent work carried out with a small team on their spare time to improve the TV UI experience relying on a simple full leanback interface https://www.reddit.com/r/NovaVideoPlayer/comments/azqow3/new_beta_release_of_nova_video_player_v33/
You can check the latest beta of the application and find more details on the r/NovaVideoPlayer subreddit.
Time for MPV to step up with a new update IMO.