I'm interested in HDTV, and I was downloading some 720p clips off of divx.com. They're divx files within zip files. It makes a 20% smaller file roughly. Windows Media HDTV clips are the same way. If divx is so great why zip these files? Why not just zip uncompressed video; then there would be no data loss? I've been searching around the internet, and I couldn't find any answers. I thought someone here might be able to help. Thanks in advance.