Is this guy bright, crazy, or both? I don't have a very good understanding of quantum mechanics, so I was hoping some of you physics experts could weigh in on this vid.

He doesn't support his statement @6:27. Relativity might be wrong, but not materialism per se. There's probably a third, correct, explanation that he conveniently ommits.

I remember reading about these delayed choice experiments about a year ago and being convinced that there was no violation of either relativity or quantum mechanics. When you realise that the way they obtain their results is by taking the massive splatter of dots on the screen, then selecting a subset of these dots according to a given criterion, and finding that the subset you selected follows an interference pattern, it all seems a bit less mysterious.