I had some problems with the old ipod that I use to play background music in my classroom. Until I get it figured out I made some DVDs with Windows Movie Maker. I combined some instrumental music with some footage of close-up lava lamp action and then used a separate video converter to render it in a DVD format. I used DVDshrink to author the final disc in which the same video repeats 2-3 times. I think it runs 2 1/2 hours before I have to press play again.