Another super helpful video by Vincent Teoh (he also talks about GSR in addition to TPC, and highlights some differences between OLED and QD-OLED).
Thanks for this. I seriously just finally registered to this forum to ask about this exact issue. I just got a 77 inch LG G2 and it's gorgeous! Except when watching House of the Dragon the thing kept growing dim to an unwatchable level during already-dark scenes and then the brightness would sort of delayed-pop back on when a brighter scene starts or when I wave around the remote to "wake" the TV back up. It seems to think I've hit pause when a scene is dark. I made sure to have Energy Saver off, so that wasn't the issue.
I am just not willing to get a service remote and void out my warranty basically doing a jailbreak for a $3000+ TV, so if I can't figure this out, I might have to reconsider it as much as I love it because having to wake the TV up every 5-6 minutes when watching a dark-ish show or movie is a dealbreaker.