As reply to the movies:

Thaddius
Loved the way you got the adds in position while the fight started. Sadly the POV of the paladin doesn`t show it perfectly :-(

4 Horsemen
How did you handle switching the tanks on the caster side? I see them running around the same time. You just turn them around and set auto run, the do the same on the second and then go back to the first to stop him?

And on the melee side. Did you have a healer on the second tank or does he keep himself alive untill the first one is burned down. I also noticed that you popped heroism at the second boss. Seems kind of a waste since you kill the boss in less then 30seconds. Could have done it earlyer. Guess you don`t do it at the start of the fight because of the debuffs once you get to the second one?

Heigan
All I can say on the dancing is that it "fits" perfectly.

Sapphiron
Seems like a pretty straight forward tank and spank fight for boxers with a LOT of healing.

Kel'Thuzad
The movie makes it look easy. I allways thought that the fight required 2 tanks.

What is the exact group setup of your raid? I seen some shamans, 2 paladins, 1 boomkin and atleast 1 priest and mage.

Also wondering about your tank macro on the paladin. Mind sharing it?I know I ask a lot