mpg's almost seem like they were meant to stop working after a while. Like, way back when (this is 10+ years ago) if I downloaded videos off YouTube or such to save them, I would more often than not download and save them as mpg's because they usually wouldn't be as large in file size as wmv's . . . but then, those mpg files would just stop playing properly after a month or so: sometimes you'd get just video and no audio, sometimes you'd get nothing but clicks and pops for audio, and sometimes they just wouldn't play at all. So, up until I got my current computer back in 2012 and could actually handle mp4's, I had to either download and save videos as either wmv's or avi's (the later of which I always find gives you really tinny-sounding audio).