This guy's recording - he later decided it was demo work nearby.
this feels like a fake
ROFLMAO
http://www.sott.net/articles/show/24...-by-Scientists
Guy says he locates sound as an effect in a sound suite software
bottom line - a youtube phenom is not proof of anything - its not impossible that sounds are occuring, but you need data collection with better provenance to be sure its not a hoax.