It randomly stops working. I had to reinstall the extension to fix this. Also it grants you very little assurance the video/channel you blocked won't appear again in the form of a reupload or in a clickbait nature.

If you could add the option to black list words maybe this problem would be fixable. For example I keep asking Youtube to NOT show me 'deep house ibiza mixes', I've classified it as non interesting to me, but Youtube doesn't seem to learn I don't care. I use your extension and for a while I don't see those type of videos (because I've manually removed them). Three or four days later there they are again uploaded through other channels. It's useless to use your extension if this hole is present. I imagine this can't be easy to fix but I hope you find a way to manage this issue.