Most logical thing to do is get the roundhouse tapes. I'm sure you could find some youtube footage but I;m sure it'll sound like shit because of youtube's awesome*cough qaulity audio/video. They really are a joy to see live especially since Mikael can actually sing exceptioanlly well live and rip your face off with his roars as he displays his modest guitartastic prowess. Their live set-up is relatively simple - I'm sure Per fills in a bunch of melodies on the keyboard to fill in for missing parts on some of their older material. Truly an epic live band. Mikael is my theoretical jeebus.