Interestingly, he used a digital still camera. Not even the movie mode on a still camera, but the super-high-speed burst shooting mode of his top-of-the-line Canon EOS-1D Mark IV digital SLR, which can fire away at up to 10 frames per second. (Miranda and Reilly are the kind of people who are supposed to have expensive cameras. They're wedding photographers, and very good ones.)
The final video, compiled from over 5000 individual photographs, is arty, and a bit strange. My wife Air and I are in it, mostly in the background, but we're featured about four and a half minutes in, just as we were leaving. I'm Mr. Handshaking-Guy-in-a-Hat.