It can be Xvid, Divx, Microsoft, Radius Cinepak, and a ton of other codecs that all can be used with the wrapper that makes up the file extension *.avi. Now... to continue down that path will dilute the sole reason I'm even in this thread... I'm curious not about what codec or file format is the one of choice nor what should or might work... I'm solely curious about what works out of the box.