That's kinda what I had assumed, just wanted to make sure you weren't using AI or something like number of views

AI might have been a disaster here, I think.

I agonized for a long time about which clips should go in vs. which should be left out.

But it's subjective. For example, if I want to add a basic cooking course - who should I choose to be the authority on cutting vegetables? Ideally, I'd want a professional in that domain to do the curation.