This is a crtitical extension for anyone extensively using YouTube. Nothing too fancy on the surface, it allows dislikes to be displayed again.

Under the hood there's quite a bit going on, and unfortunately it doesn't always work smoothly, sometimes dislikes are still not visisble and accuracy isn't garaunteed. Still, the developer's efforts are greatly appreciated and when it does work it adds back a lot of the value YouTube has been trying to take away from its platform.