To your last question, what do you mean by arbitrary? If the video is not educational at all, then the generated course will likely not be good. If the video is pure entertainment then probably not a good use case.
I did not mean completely arbitrary. I meant:
If I have personally qualified a person as an expert on building retaining walls for landscaping and want to have your platform process a particular video, would you allow this?
I'm not necessarily interested in the topics you're providing resources around. I want niche topics. Like roofing or how to properly set up a traditional hand planer.
I am interested in individual, often amateur contributors of niche knowledge on youtube, not channels designed to educate in the first place.