I’ve replied to that, I’m not satisfied. It’s a bit of a wall of text though.

TL;DR: “clean room reverse engineering” has a specific definition and I don’t believe it applies here. I do believe that the cited TOS applies to an internal API endpoint which is publicly accessible. Both things spell trouble.

I also take issue with the phrase “does not use official YouTube APIs” in the readme, but maybe that’s pedantry between “official” and “documented.”