u/Baji10000

https://reddit.com/link/1t2gll0/video/al2q9vzi3wyg1/player

I know he used screenshot but there is gotta to be a way to achieve this quick and how he made the shake so unnoticable??
Tips please beginner here.

I tried to fuck around and find out but it got worse and now my browser is gliching i was trying to achieve transparent, i tried everything but the stupid background is still gray and boring.
Please tell me how can i reset this browser everything i also installed sine mods so it does not happen if i reinstall.
Also suggest some clean theme anything better than the default one which does not consume perfomance.