Nobody zips movies. Are you sure about its size? I'd think you misread and it's actually just about 700 kB large. In any case, unless you're a true masochist, just don't download any huge ZIP, RAR etc. files. You can't preview them and the chances you download packed garbage is pretty high. As said, nobody with a sane mind would pack a video file. I certainly don't claim everybody has a sane mind though.