Your DPS is still really low for that boss, 2mins into the fight you should be on 300-600k dps (300k without BoF, 600k with).
You should note that he let his stagger get ridiculously high. (Stagger counts as damage done on WoL).
I'm world 3rd on that fight, 2nd brewmaster and I didn't tank the boss (okay, might have pulled aggro a bit) until P2, plus one of our DPS died, so fight would have been over much quicker (P2 would have been shorter, so average DPS higher).
By the looks of it, he also tanked all, or nearly all of the adds as well as the boss (so CCing only 1 or 2 mobs at most)