The ad agency I work at has several ipods for a client of ours. We want to put one of their commercials on it, so they can watch it. I can convert the video, not a problem.
The problem is when the client first plugs it in, it will ask them to link it to thier itunes and erase the video on it. So how does one have a video on it they can watch, just like it came from the factory?