http://twitter.com/mattryan Matt Ryan of The Frugal Geek blog on Lockergnome shows you how to play AVI files in QuickTime on your Mac. There are a number of apps that allow you to play back AVI files on a Mac, but that requires installing a separate player just for those files. If you like to keep things simple, configuring QuickTime to support AVI playback might be a better way to go. In this video, Matt Ryan shows us how to install and configure Perian http://perian.org to add AVI playback to QuickTime.