Agreed... avi screensavers have been around for years and they are cheap to free. If you actually paid 70 bucks for that psik0tik, then I feel for you. (not really, it's kind of funny, but i'll pretend)
Also here's a tip..... most "avi" screensavers are actually m$ directshow screensavers. What this means is that divx, mpeg and virtually any wmp-supported format will also work, just rename the extension to avi if it doesn't cooperate.
Of course mov's still need to be converted, but that fact that people still use such a bloated format frightens me.
Like bobby said, qt pro, among other programs, will solve that problem.