I just spent over 4 hours trouble shooting my entire setup from hardware to software, almost even re encoded my entire library before pinning it down to just a plex update that broke DV playback.. I figured out it was only DV playback but took the longest time to pin it just to plex on apple tv. kinda of stupid i have to use my lg tv’s plex app instead of the apple tv 4k to play my video files now… Dear god, plex team please push and fix out.