I have a lot of MP4 files on computer, phone (Android), thumb drives and external hard drives. This is the default save mode for a video-generation program that my brother uses to send familygrams. Is there a way to load these on my Mini? A search here gives me "load" as the keyword and a lot of threads that don't seem to have anything to do with what I need. Also, being new to the iPa(i)d, is there a way to have these run in the background while my GPS program runs? Either to switch back and forth, or just to have the audio running in the headphone jack while something else runs in the foreground?