Welcome to the world of GS3 garbage! Guess what? The videos you recorded on your GS3 will NEVER play on your computer no matter what program you use to open them. Samsung knows that they use a different version of mp4 that is proprietary and they are not letting you have the codec for your computer. You can search the whole web, spend hours tearing your hair out, and you end up with soundtracks ONLY when you try to play GS3 videos back on any platform other than Samsung's. Great, huh? It will only get worse, in the future, until someone shoves it up Samsung's rear by coming up with the proper codec and/or converter.