I have made a 100% Nightmare TAS that beats the whole game in less than 1 hours. It's a fanmade movie, not the fastest possible and there are some minor mistakes.
Emulator: Bizhawk 2.3.2
SNES core: BSNES
ROM name: Doom (USA).sfc
ROM SHA1: 736B9B994F506DE0893CEB181F942739DA089B05