More than just a YouTube downloader, AV Tube is a free software program that helps you download both Metacafe and YouTube video clips, and then save them in MP4 or FLV formats, so that you can enjoy them on iPod, iPad, iPhone, MP4-player, Zune, wherever and whenever you please. Storing YouTube video clips on your computer or laptop also means that you can play them even without access to the Internet or when they have been removed from YouTube.