And no, that's not a typo in the title, he really is level 80. You can check his armory if you like, as a link is provided in his channel. Aelobin has a mixture of Cataclysm blues and Wrath purples equipped, and as you can see one minute and 30 seconds into the video when the boss hits his enrage, he has managed to hit the avoidance cap.
Thanks to the changes to vengeance, Aelobin's attack power is also rather high, 1.5 million when he brings up his character pane at 1:59, awarding him a melee damage increase of 109,766 damage per second. It climbs still higher after that, peaking at almost 1.9 million attack power, and his damage meter reports his DPS as 275,715 for the entire fight!
It's very entertaining viewing, and congratulations to Aelobin on the kill, and on getting Share the Pain at the same time!