For all the people trying to guess if Anduin lives or dies because there are 2 "Finale" clips in the video, my guesses are the following.
Finale 1 is for the alliance part, where the Alliance Player and Anduin confront Garrosh. Garrosh strikes down Anduin and sends the Player to tell this story to King Varian.
Finale 2 happens in the Horde side and you see how Garrosh kills Anduin and starts to bable about Mastering the Sha's powers.
---------- Post added 2012-10-12 at 10:01 PM ----------
The order in which the soundfiles are played are probably not following the correct order.
For all the Soundfiles I heared so far, Anduin truly dies. We will see later what happens next, but all indicates that he does die at the hands of Garrosh.