Death Metal Special 1993
Death Metal Documentary
Here is a Death Metal documentary from 1993 with excerpts from concerts and interviews with band members Slayer, Gorguts, Atheist, Demolition Hammer, Death, Cannibal Corpse, Sepultura, Entombed, Morbid Angel.
At about 20 minutes in, it's got some Morrisound Studios stuff as well as an interview with producer Scott Burns who talks about how Death Metal is starting to become stagnant. That was 1993.