afaik if you want to retain as much quality as possible while saving space you do want to do it on the CPU (so not hw accelerated - slow)

I would momentarily drop all rules (if possible) to see if it has to do with firewall at all

Let me guess, samsung odyssey? Had one of those, never again.

Friend even called me that he has fucked up his pc rebuild - his Samsung monitor was just not waking up because it literally turns off.

https://networkingtoolbox.net/reference/ipv6-privacy-addresses

https://man7.org/linux/man-pages/man1/hostnamectl.1.html