I know the video title says "In the Garden of Souls" - ignore that. That's the title of the album that this track is on. The song is called "Unbecome." It's by Vas, the duo of Azam Ali and Greg Ellis. They're often compared to Dead Can Dance, both because of the female vocalist who often sings in idiogloss (Lisa Gerrard, in DCD's case); and because of the global influences on their music.