sorry if this is off topic

i have a 6700xt and i noticed that when i'm playing the game, videos seem to lag.
Like if i'm playing a video it just randomly stutters or struggles to load, is the game the reason?
do videos playing on my pc need the gpu over something else?
i don't know if it the game an di need to adjust the settings or it's something else that fucks up my pc.

I know my gpu ussage is high but there doesn't appear to be any problem with the game itself when running it