An alternative option for this is uBlock Origin, with some custom filter rules from the wiki for the uBlockOrigin subreddit.
https://old.reddit.com/r/uBlockOrigin/wiki/solutions/youtube
https://old.reddit.com/r/uBlockOrigin/wiki/solutions/youtube
The only way to more or less reliably use uBO is by installing Ungoogled Chromium, because the minute Google completely patches out Manifest v2 support they will patch it back in.
According to the source code and Gerrit this hasn't been patched out yet:
--disable-features=ExtensionManifestV2Unsupported,ExtensionManifestV2Disable