I found that my iPhone 4 automatically stops video recordings after about 49:50 (min:sec). I can almost immediately hit record, and it starts recording another movie. I'm using the camera app built into iOS 4.2.1 I'm trying to record lectures, and would rather just "set it and forget it". Hitting record every 50 minutes isn't that big of a deal, but frequent checking of the phone, making sure that it's still recording, can be a significant distraction. The screen shows an hours position in the elapsed time displayed, so I'm hopeful that there's a way around this! I'm sure I suck at searching. Couldn't find anything about this either on these boards or Google. Apple's iOS 4.2 user guide doesn't even mention the runtime limit.