I've got a nice compact Canon digital camera that takes great pics and HD video. I'm able to transfer and view all the pics on my iPad, however the videos are transferred, but won't play ( they will play perfectly well when downloaded from my camera to my PC). When I updated to 4.2 a couple of days ago, one of the camera's videos plays beautifully, and the others will play, but only sound, not video. Wassup with that?