I've downloaded a couple of mpgs (videos). They are typed for QuickTime. QuickTime launches but the video (or movie) doesn't appear. Tried to open through the finder, but it doesn't even recognize that I have mpgs in my folder. I made sure that I put .mpg after the filename. I'm on a G3 Mac running System 8.6, LimeWire 2.1.3, and tried using version 4 and 5 of Quicktime.