Hello all, I've just finished making a book and video of my son's first year. I made them in iPhoto and iMovie respectively. I exported the movie to a mp4 and my intent is to put a copy on a flash drive and tape it inside the book. That way when somebody looks at the book they can pop the flash drive into a computer and watch the video if so inclined. My question is what would be the best format for the video that will make whatever computer it's used on more likely to play it. Is there any format that will easily play on both PC and Mac. Come to that, how do I need to format the flash drive so it can be viewed by either type of computer? Thanks in advance!