No avi in itunes
No unfortunately you can't import avi videos to your itunes library! What i have done with my huge avi content is : open each file with quick time and then choose File:Export and then choose the "Export to Apple TV"!this option converts your avi to a playable format for your itunes library! You can also choose export to mp4 or .mov but you may have to choose your quality size etc. Export to Apple Tv is the best option(takes less time and gives a nice video quality)!