For you general info, a full movie .avi file will be at the whereabouts of 700MegaBytes. Larger files than that either mean that you found a better quality file or a file done in another format.
.wmv videos have horrible quality (but are smaller) and mpegs have a higher quality but are way larger.
Try typing in the search field the movie that you want, launching the search, then clicking (in the search results window) the title bar of the size column until you get the larger files displayed on the top.
Or just go and rent the film and save yourself the trouble of waiting for several hours (at best) for a file that you wanna watch now.
