From my googling, this is a pretty common problem with Samsung TV’s and nothing really to do with transcoding.
Some links for you: Plex TV v2 Beta for Samsung 2016+ UHD Devices - #42 by sLumpy
You might try this: Samsung TV Unable to watch Plex - player_error_connection_failed - #19 by DMackG
From the link above:
These steps fixed the problem for me. 1) On the server PC, open Server → Network settings and disable “Secure Connections”. Required & Preferred do not work for me. 2) Uncheck “Enable server support for IPv6”, "Enable HTTP Pipelining ", "Webhooks ". 3)Turn off TV 4)Restart Plex server (I closed program on my PC, then re-opened it) 5)Turn on TV and reopen Plex app. 6) It Finally works!
Here’s my setup and I didn’t buy Plex Pass:
-PMS Version 1.5.5.3634
-Model UN60KU6270 - Samsung 60" (2016)
-Plex app for Samsung 3.0.11 (3.1.0) downloaded thru TV from Samsung app storeHope this helps you guys…
