There's a music video that is unavailable in iTunes and hard to find, that I want on my iPhone. I managed to find an HQ version and downloaded it onto my MacBook as an mp4 file. It is in my iTunes and now on my phone, but the aspect ratio is a little awkward. It says it is 640x272, so the video looks really wide and thin. Is there anyway to change it so that it fills up the screen a little more and is proportioned correctly?