So I'm compressing a little iMovie clip for use in a Keynote presentation. But there's a catch: I'm presenting from a slot-loading blue iMac! While it is running Panther and QuickTime 7, it's in no way capable of playing H.264 video. I need a complete list of settings to enter in Keynote's "Share to QuickTime" dialog that will make a movie clip that is A) very good quality and B) easily playable at standard 640x480 resolution on the old iMac. What encoder? What bitrate? What other settings? Most of this is jargon to me. Any video wizards out there who care to help?