I setup media server on my windows 10 machine which has a i5 6500 cpu, 16gb ram and nvidia 1070. I am trying to play a 4k movie on my hisense androidtv using the app and even though I set it to max quality and the player says the video source is 4k hdr my tv does not trigger the hdr settings. Is this a tv issue or my pc? Also the picture buffers really bad even though I have a gigabit home network
sounds like your server is transcoding and converting to 1080 (losing the hdr).
I don’t know if your tv can stream 4k with plex, you might search the forum with your specific model number.
for general 4k info see @ Plex, 4k, transcoding, and you
for smart tvs in general
- almost all of them have 100mb ethernet, which is not fast enough for many 4k movies
- none of them support HD audio (ie truehd+atmos)
- a lot of them have limited subtitle support
- if the audio is transcoding+subtitles enabled = this will cause video transcoding
so how about if I use the plex app on the xbox one x, would that work?
you should certainly try it, but xbox has it’s own problems, you can search or review the xbox section of the forum.
as alluded to above, you can potentially avoid a lot of the 4k problems by ensuring you select/use ac3/dts 5.1 audio and keep subtitles turned off.
if something does not play even then, it would take more details and troubleshooting to narrow down.
Plex client version? Available online, or go into Plex client settings and look in lower right corner of screen.
Verify a couple of Plex client settings:
Video Quality
Adjust Automatically = Off
Home Streaming = Maximum
Given your problem description, it seems the video is transcoding, which removes HDR info from the video.
Play a 4K HDR movie with an AC3 (Dolby Digital) audio track and subtitles off.
While playing the movie on your TV, use Plex Web and go to Activity -> Dashboard. If needed, click 
to expand the data. See sample screenshot below.
Is the video and audio direct playing / direct streaming / transcoding?
unfortunately this is plex pass required.
I recommend tautulli as an alternative dashboard.
Now Playing info should be available to all users.
The Bandwidth, CPU, etc requires a Plex Pass.
https://support.plex.tv/articles/200871837-status-and-dashboard/
I’m pretty positive, that the expanded details are plex pass.
non-plex-pass shows the compact now playing (without the transcoding details).
unless it has changed. just going by previous non plex pass users reports.
that said, I would agree that expanded now playing details should be available to all (if in fact it isn’t).
in the mean time, I don’t have the time or patience to spin up a non plex pass test server to confirm 
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