I am surprised nobody explicitely told you they are fake yet. The time this videos became popular many people cross referenced the sounds with movies. I dont remember which movie tho, but google deeper :)
Yeah it's definitely just a troll, looks like a whole scheme that works well because there really are many unexplained sounds and vibrations caused by e.g. heavy industry or geological events.
It's surprisingly hard to separate the fakes from the real stuff these days and the trolls exploit that to optimize the effect.
