Cestus Dei has a movie on Overlord Mata Muram, found at http://www.daermonn.com/.
Also, I believe Township Rebellion and Raging Fury have some raid shootage. You can find them at http://www.townrebels.org/ and http://www.lavanet.no/rf/.
Good luck.
Edit: Frakkor beat me;P RF video page is found
here .
Edited, Thu Dec 22 11:07:36 2005 by Goalkeeper