They [Warner Music Group] did put a [DMCA] claim against it, but allowed it to stay on so long as they could advertise on the page. Then one day they just removed the claim.
What I take away from this is that it is not necessary to build art by hand from the molecule up. "Half Immortal" is built from an existing video game, from someone else's game models and color-adjusted textures and set to music performed by a third party. Yet I challenge anyone to identify this work as anything but wholly original.