No that's not a trailer for a movie...neither is it fan made. It's the OFFICIAL MTV from the Poets of the Fall song 'War' which was also featured in the Alan Wake videogame. You only get to hear the song in the game through a radio but its a very nice song! The interesting thing about the MTV is that it shows the scenes from the game as a live action movie! I love the way the scenes were cut and the direction of the MTV.
Poets of the Fall also played the songs from the 'Old Gods of Asgard', the guys in the game. The moment 'Children of the Elder God' plays is in the game perhaps the best part of the game for me!