Just watched the film. Its okay. Some times nice, some times silly, some times strange.
Its from same director of Sigur Rós' "Óveđur", right?
Well, about the score.... is not black metal, is really Sigur Rós. Old stuff. Parts of it (like "brennistein", "dauđalogn", "varđeldur", "eg anda", "all right", "flugufrelsarinn" and even "veröld ny og ođ"). Too incidental. Just for atmosphere. And nothing new. Nothing!