I meant to jump on the forum yesterday to list all of the stuff I remember, which included everything posted thus far with the exception of Masterplan (thanks for mentioning that one, PromisedLand! I had no idea about it!), but I was too busy at work to do it.
As for anything that hasn't been mentioned yet, I believe that Primal Fear's "Live in the USA" features footage from their performance from the Thursday night show at ProgPower X. It's not exactly from the festival proper, but I'm sure that folks would be interested in seeing it, anyway.
Besides that, only the ProgPower V DVD compilation was mentioned. Let's not forget the Lucid Lounge DVDs for festivals VII, VIII, X, and XII. With that, I believe we have the complete video discography!
Stay metal. Never rust.
Albert