I have a few new MP4 videos that won't play on my lap-top, is it just a matter of downloading the MP4 player onto my hardrive? I've saved them to a flash drive. There were a few choices that probably meant the same thing, MP4 download, MP4 codec, MP4 player. Any ideas, I'm totally computer terms illiterate so type real slow and in simple English terms so that I may understand. Thanks.