That's our own Dave in Texas who done that there work.
MarkJ sent the idea -- and the tools.
'm no whiz at video editing, and i get the impression you aren't either, but there seems to be a web service that makes it easy to lay subtitles over existing Youtube videos
: www.overstream.net
The website seems pretty moron-friendly. The final video would play though their site, but if you read the FAQ, it is possible to create a self-standing youtube video that could be hosted on your site or uploaded to youtube for maximum viral spread. (perhaps some AoS minions could handle the technical details for you..)