Wanted to post this here just to make sure nobody misses this.
This is Mayhem performing live in 1986. Lineup is Euronymous (guitar), Necrobutcher (bass), Manheim (drums), Messiah (vocals). They perform 3 covers (Black Metal, Procreation of the Wicked, and Welcome to Hell), and then Euronymous does an...encore. Messiah's vocals are AWESOME for the material here. He does both Cronos and Tom Warrior well, and seems like a decent front man.
Trivia: Euronymous' hair was blonde.