While there is plenty of information out and available on this fight since he was killed on beta pretty long ago finding a video of fighting him is hard to do (only one that shows the most basics of the entire fight). This is mainly due to he bugs out after the first try resulting in no infernals spawning. Without the infernals the fight becomes pretty much a tank and spank fight.
Now what this video shows is a 3% first try (of that night we had actually killed him once on beta in bugged form after a night of attempts) and a cut to the end of the actual kill later with loots. Also it starts partway through the fight since we had a few players who had never did the fight weren't expecting to do so well.
For those curious I'm Feral Spec (1/49/11) and the offtank for that Karazhan group..