Useful add-on. It would be nice to have a view for all watched channels with the videos from them. If the search next page buttons wouldn't move on different pages you could click faster through different sites without accidentally deleting a video.

This fills a nice niche in my life, since I have YT History disabled. Now I can see which of the vids on my Subscription page I haven't gotten to yet.

Developer is very responsive to ideas and bugs, and the extension has improved very quickly.