X265 1080 video's play with sound, but no video. Same video plays in Channels on web browser on the Tablet. Also plays in plex without transcoding on the tablet. They just don't play in the app. Live TV and non-x265 videos play fine. Thanks.
Edit...the x265 is being transcoded to x264 in Plex on further inspection.
Try changing the video driver between hardware/software/hybrid.
Settings > Playback > Advanced
If this doesn’t work, it’s possible the tablet just can’t support it.
Can also try to reduce the streaming quality to 8mbs, I think it forces transcoding but it enabled playback on my fire tablets.