It doesn't change YouTube at all

Doesn't work.

Unfortunately this doesn't seem to work at the time of writing. Hopefully it will get fixed soon.

Used to use this constantly. Sadly, it no longer functions. The red viewing progress bar is shifted to the top of the box, but the ratings bar does not show.
Debug shows:
Uncaught (in promise) SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
Uncaught (in promise) Error: Could not establish connection. Receiving end does not exist.