In Space, No One Can Hear You BRAAAAAHHHMM

Someone made a Ridley Scott’s Alien trailer in the style of Ridley Scott’s recent Prometheus trailer. It’s neat-ish. I have a question, though: At what point did it become legally required that every single movie trailer has to be a bunch of random, 1/4-second shots with the same loud, low note repeated over and over again? Or did I inception myself in BRAAAAHHHMM-world at some point?