QuickTime video, basically the same as AVI except Apple is behind it. A totally arbitrary choice of wrapper format on my part (I could have used AVI, I mean). If you wish to pursue viewership of my short film concerning the life and love of one looming devil, then try uh a QuickTime browser plugin or something? I dunno, I use Media Player Classic in Windows (XP), and stuff seems to just work; VLC also plays lots of things
http://www.videolan.org/vlc/