YouTube extremely slow and laggy

Description of the issue: YouTube has a very noticeable delay when switching between the different viewing modes i.e. from full screen to mini player or exiting full screen mode. There’s also a noticeable delay when using the arrow keys to seek forward or back. I’ve tried using YouTube in a private tab and it works fine.

Exact URL of the website in question: https://www.youtube.com/

Did the issue present with default Shields settings? (yes/no) yes

Does the site function as expected when Shields are turned off? yes

Is there a specific Shields configuration that causes the site to break? If so, tell us that configuration. (yes/no): no

Does the site work as expected when using Chrome? Yes. I’ve tried it with Chrome and this issue does not persist.

Brave version (check About Brave):
Version 1.78.97 Chromium: 136.0.7103.93

Hello! Do you see the same experience if you toggle graphics acceleration?

brave://settings/system