How long does it take to download a DVD on DSL or cable-modem? A DVD is 7+ GB and high-speed DSL (over 700Kb/sec) is just able to do video (TV quality) in real time. Most people still have 56Kb/s dialup!
Downloading quality video is still a long way off, or a job for very patient people. You could go to the video shop, rent the movie watch it and return it before the download finishes!
A lot of these are converted to a format called DIVX...which crunches the file size down quite a bit. There are files out there of full movies they call DVD rips that are about 700 meg. (enough to burn onto a CD-R)