I recently purchased a Sony 49x900e to jump into the 4k world. In the past, I have saved all video files to my Synology NAS and streamed from there for viewing purposes. I tried to download 4k movies so I could take advantage of the new TV. However, I haven't been able to find a way to get the files to open. Have any of you had success with this? Or does anyone have any ideas? Any input is appreciated.
EDIT: I tried a new 4k video file stored on my NAS, directly wired through my network to my TV. It opened with VLC player. That seems to at least work for now. Thank you all for your ideas and assistance. I at least have multiple options to try if VLC doesn't work all the time.
Check to see if your NAS is Plex compatible. Install Plex server on the NAS if you can. Install the Plex for Android TV on your TV, done.