I have A80J with Google TV. Whenever i try playing 4K DV(Dolby Vision) video content (~60-80GB) the option to select subtitles and audio tracks goes away from Native player and None of the other players support DV . However i try playing it on VLC, FX player, or Nova player i can still see all the subtitles and audio tracks however it doesn't detect IMAX or DV content and plays as normal video content.
Try Just (Video) Player :
https://play.google.com/store/apps/details?id=com.brouken.player