Zlat: What is Auto game plus and what does it do? I don't have such option in my NU8002. Just Game motion plus or Freesync. Once I set my PC is a gaming device (it wasn't recognized automatically), it always switches to game mode when using it.
Dunno what the difference between basic and ultimate is. So why not to go with ultimate? 🙃
My screen also flickers a little bit with freesync if the current FPS is below 60 (despite the low framerate compensation

), it's especialy visible at the static images in the game like menus. What is weird is the fact it flickers in the left low corner only. The rest of the screen is okay.
Anyway, considering you have 60 Hz panel, use Freesync only for those game with 60 FPS goal which have some minor dips because your freesync range ends at 48 FPS. For those game with 30 or 60 FPS (stable) lock, use Game motion plus for maximum smoothness.
Holmes 108: Can you post that youtube video? I'll give it a try. I didn't know there were youtube vids with surround sound. Anyway, my sound settings also allows PCM only with youtube. But I use Plex quite often and it transfers sound to my receiver over ARC without any issues (all 5 channels). It then switches to Dolby Digital automatically.
Speaking about the Xbox, what sound output does it actually have? Is it 5.1 uncompressed (like when using PC) or does it use compressed DD or something like that?