I've neglected posting for months -- here's a quick post, because this thread is awesome.
As you've seen, this a single, professional shoot that was edited into little bits. It's a 2 camera shoot, with the tired old bookcase and optional, post 1940s big houseplant. This is no laptop video. Notice how the bookshelf is slightly out of focus.
I haven't watched that many of them but I think it's a single camera. The zoom ins are just cropped videos done in a video editor. Since they're probably filmed in HD, zooming in wouldn't affect the resolution/quality in a YouTube upload.
It definitely looks like one video shoot chopped up into little morsels of insanity.







