I also notice that you first said “browser extension” but later you said “Chrome extension”. Are Firefox users going to be out of luck?
I did say Chrome browser because with the deprecation of manifest v2, I had to make a choice about which to support. I decided given Chrome's larger market share that it would benefit the most people sooner. However I'm building it in such a way that porting to Firefox shouldn't require much additional work.
If you have a look at the category tree, where do you think video essays would go in that?