according to this particular screenshot, you are direct playing video and audio, which is good.
This means either the connection simply isn’t fast enough (wifi or wired), or that the samsung hardware that runs the app isn’t powerful enough.
You could try turning off subtitles to see if that makes any difference.
Most tvs have only 100meg ethernet. 4k blurays can exceed that, so that can cause buffering or dropouts.
You could search for 4k samples of different sizes/bitrates and try to determine what the limit is.
Google for jellyfish 4k
also, you do not need to open multiple threads for the same problem.
