I first head about Alt-J the other day when they won some British Gay-Off award. Pretty catchy stuff, electronic and vocal based music. The only thing is these guy are trying sooooo hard to look tough it is funny. And with their British accents too! The most realistic part of the video I saw was the tattooed white boy with an over-sized pit bull on a short leash; In cities like Oakland and Amsterdam and you will see those guys wandering around.
Pretty funny video and the music is decent, even if it is a show.