What song is this i have no idea?

Basically it's this song, I'm pretty sure it's quite modern as in the last couple of years. I have no idea what it is but it sounds a bit like the beginning of a pendulum song called granite before it gets into the proper song. However it sounds like choir people singing and sort of "oooh- ahhh" ing over each other. I am perfectly aware no one knows what this could be.