SOLVED: High CPU usage in certain situations

[Antonbp5]

Hello All.

I have bumped into a wierd issue.
If I play a movie straight from the browser or the Android app, CPU usage bumps to about 90% usage, and makes everything very laggy.
I found that for PC, this issue doesn't exist if I use the JellyFin Media player, but on my android tablet it still does it. Are there any alternatives to JellyFin, that doesn't do this? Or is there just a way to fix it entirely?
Info Below:

Jellyfin:  10.8.10.r01
Docker on an Asustor NAS

Please let know if you need any more information. And maybe how to get it. I am kind of new

If anyone knows how to fix it, or circumvent it, it would be much appreciated.

thanks!