I've just got a new iphone 4s and I need to put some of my own videos on the phone. I've converted a test video into mp4 m4v with h.264 compressing. Then I put them into Itunes and transferred them using sync. Itunes says that they are now on my iphone, however, when I try to find them on my iphone, I can't see anything in my videos app. Where are they???