What do they mean Quicktime?
Quicktime is a player, it isn't a codec. I really don't understand what they mean by Quicktime. Some people here still thinks a .mov file isn't playable on Windows Media Player, it is!!!! a .mov file is just special wrapping code of a video codec and an audio codec. Its the video and audio codec that you computer decodes in special way.
They should specify a codec for Quicktime.
Intel Indeo & Cinepak are codecs for quicktime, and WMP for that matter too.
Personally a MPEG-4 Codec, like
http://www.3ivx.com
or
Apple's Built in MPEG-4 Codec will do nicely, and should be compliant and give it enough resolution to transfer it to MPEG-2 for when they play it on a DVD