I have a bit of a problem: When I record a video on my iPhone 4s they play back fine. Transfer them to iPhoto still plays back fine. Add them to iTunes, still plays back fine. Try and play them on Apple TV and it plays the first second or two then throws up an error. I have tried with a few now, happens every time. My previous iPhone was the 3G so I can't compare to other iPhone videos. Has anyone else had this problem? Any ideas on cause or solution?