OT I know but my son did a different matrix effect. The one where NEO was being shot and he would be moving fast but in slow motion, levaing a blur of himself of each fast move. It was cool. He's only 15 :) Took him a few days.
The one on the VASST site isn't missing media, they just didn't sweep the media pool, that's all. It's pretty common to get the "missing media" message.
if u want a really really easy way to do it and u cant figure anything else out you can download a matrix trailer and use the blank backround with the letters falling then find the font used for the matrix lettering and make a title. but thats just if your lazy