I have just bought the apple tv today and I'm trying to watch videos from my itunes library I have videos in the original .AVI format and I converted them to mp4 using handbrake on the apple tv 3 preset I have an hd tv as well as a macbook pro using os lion that i bought two years ago. Point is when I try to play the movies on my tv they dont load ( they play just fine on my macbook pro through itunes) and I get an error message. I don't know if this exact question has been asked before but I looked around and couldn't find a match. Do i need to fix my presets on hand brake etc? what should I do?