Well, I'm really not sure you care about my opinion…
But my advice would be video tutorials might not be a priority… Video tutorials are pretty long to create (when they are done seriously I mean).
I know they're quite "trendy" those days, but they are also very long to watch when you really want to follow and learn. My idea is that they are a good medium for a short introduction to your extension, showing the great lines of the structure and what can be done with it.
But web pages, when the content is smartly done and structured, are so much easier to use. You can skip to whatever theme you want to learn about. Etc.
The problem I met with your tutorial pages (and even within the extension itself) is that things are not always clearly explicit : most of the time they are just "doubled". Let's say I want to learn how to use some window/tab of your extension. I go to the proper topic. At first you show us a screen capture of this tab. OK, thank you, I have the same one
Then detailed explanations :
Zoom control : The enabled/disabled state of the Zoom Control
Find Control width : Width of Find Control field
Min Zoom : Min Zoom for Map
Etc.
That's a lot of room for so few infos.
Take only this example about a question I asked you this morning (well, it was morning for me !). About how to set the map bounds. I mean I didn't know I have to enter left bottom and right top coordinates. Maybe this information is so obvious to you ? But for a new user ?
So yes, I would suggest you focus on those explanations rather than any video. Much more efficient. And as another bonus : this is something you can do little by little. Each time you can find 10 minutes, you can improve your docs.
OK that's it for my suggestion, knowing that maybe I don't have your whole context of course !