This script disables YouTube's new rounded corners (reverts back to the previous layout from 2021.)
< Feedback on YouTube - Non-Rounded Design
Edit: There is dislike bar UI issue (only in disliked video), but you have to refresh it first for the bug to take effect. I've included screenshots of it.
p/s: I'm using RYD 3.0.0.6 extension with your Old Icons Restorer (they look nice!)
Works perfectly well and compatible with RYD.