Damnit, I think I just fell for AI slop.
Not the bunnies jumping on a trampoline stuff. Half an hour of something that sounded like (and was advertised as) a lecture of a famous physicist explaining why interstellar travel is impossible. In a sense that physics forbids it, backed up by calculations.
I still don’t know if the text itself was AI generated or stolen from reddit or some blog, but I’m pretty sure that the professor whose name is in the title never has published anything like this.