>>334953946
He says how to do the passthrough thing in the comments, but otherwise I think he just aligned stuff manually. Also it seems like he had dark curtains/blinders which helped with making the virtual window more apparent. Since the passthrough glitch works by just overlaying a transparent layer of the game view with the passthrough video, the best results will be when there is something dark IRL where you want virtual stuff to be. You also need dark spots in your virtual environment where you want the passthrough feed to appear.