I'm giving this 5 stars even though I kinda think there's a little flaw with it. And I'll tell you why:
This is the only song ever that made me cry! I genuinely cried on this one. It has such an eerie feel to it... And it's just AWESOME! (and it's also pretty long) I can't give it anything else, than 5 stars...
But there's still one little thing: All the time I expect some kinda climax. Yet all the time, it just switches over to a different style (which is still awesome in its own way).
If this would really go with a short film, you might add a few "more intense" moments. Especially since there seems to be something creepy that needs to be destroyed...