I shot a bunch of video a while ago on vacation. It was over the course of a week with both my wife and I using the camera. Most of the time I used it in Movie mode and my wife used it in iAuto. When I got home I realized that the aspect ratio of the videos was different, some were 4:3 and some were 16:9. I just went into the menu and can't find anywhere to set video aspect specifically, and I know we didn't touch that setting during the trip.