I think I've been watching these randomly since the beginning just trying to figure out what he's doing. I thought that was the game here!
The video descriptions and the pinned comment are also really information dense though.
And John Plant, the guy running Primitive Technology, has published a book, which I've not read but could be of interest to people who like this kind of content and would like more of it in the text form.
Maybe it's that most your comments are very short and single sentences and it's triggering some automated system looking spam as a false positive? Maybe it's worth being slightly more verbose in replies for a while, in case that's it. I assume if you get enough people vouching for comments the ban reverses itself, but I don't really know. You could also email hn and ask why.