I have been putting videos on my iphone since the 3g days and have never understood this. Sometimes my videos will have the zoom option(double tap the video or the little button in the upper right hand corner) and others simply will not. What option am I looking for when encoding videos for my iphone? Or is this something only certain videos can do no matter what I do to change it? I would like the option there everytime so I can zoom in as needed to get rid of the black bars as much as possible. Also, I thought with the iphone 5 being in wide screen format it would make this all easier? Im still getting black bars on wide screen videos. I can crop them out and stretch the image but the picture looks off... Any advice?