I think this might be my favorite of the four videos so far. It's plausible that Maraad might know this - there's no reason it should be unchanged between his Draenor and the one we're going to explore. But moreover, and suitably, it's the darkest of the four to date, which Kilrogg making a very difficult decision that costs him quite dearly... and more than an eye.
I also like the rumination on the Alliance's faith in the Light at the opening. Varian's 'So I'm told' was a nice beat. Check out the video now.