Thanks! There's a video I've been looking for, for years. It's about web technologies and recusion ("I put a VM in side a VM"), and it's satire / comedy.
It might be this one I'm thinking of, as it closely fits the bill. But something is telling me it's not, and that it was published earlier.
[0] https://www.destroyallsoftware.com/talks/the-birth-and-death...