It's much easier to see if a video is worth your time with this add-on.

Even if there is no crowdsourced descriptive title, this add-on will fix ALL CAPS and replace the thumbnail with a screenshot from the actual video. Very nice for those videos where the thumbnail looks cool but the video is just a talking head.

If you don't wanna pay, just say so on the website and you'll get a free key, the only price is that you have to wait a few days. As a poor person I really appreciate this!