I have edited my video clips in Moviemaker and saved it using the recommended setting, but cannot play the saved file on my computer. I am running Windows 7 Home Premium. The idea was to copy it to a flash drive and view it on my TV set, but I can't do this either. I can play older video files I have created going back several years, but this latest one doesn't work. Why is this? My TV should play MP4 files but this one won't work. Is there any other way I can achieve my purpose?