Stupid Chroma Keying Tricks
Photo Booth as bundled with Mac OS X 10.5 and later features the ability to replace the "real" background with an image or video. This is just a compilation of a few demonstrations of the idea, made after Youtube user Buchoass pointed out that I "have a green screen for walls".
Uh yeah, yeah I do. My grasp on reality is a bit shaky at times.
Here I was planning to build one someday (most probably for dubious purposes) and I hadn't even thought of that. Well.