I have issues with the Samsung Plex APP.
It does play everything fine, except HDR files, where it says ‘not enough CPU for conversion’
My tv is a Samsung Q67, and the Plex server is running on a WD Mycloud HDD.
I believe the options for both the specific file and the general settings are set to “direct play/stream”, so I don’t understand why it wants to convert the HDR files.
The TV is plugged on the network via RJ45, if that changes anything.
Edit : the same files play ok on my Windows 10 PC through the plex App
Quite likely that you’re trying to play some audio or subtitles that the Samsung platform can’t support at this time. Can you provide the Media XML for the file, please?