I bought a cheap 720p DXG-569v camcorder at wally mart. It records to an SD card and it actually came with a cheapy 2gig sd card. The problem that when I pull the .mov off the camera and play it using quicktime, the video is really jerky. Not jerky like I can't hold the camera steady, but the video skips around like the sd card can't keep up with the video recording. is it possible that I need a name-brand card or a high speed card for this thing to keep up? It really is a nice little camera with some good potential, but right now I'm not impressed.