I heard it Texas about six months ago. Sounded like the ground was groaning - from a low rumble to higher tones. At first, I thought it was a freight train...then I realized I don’t have a frieght train near me. It was loud enough to hear and feel from inside the air conditioned house.
I think some of the you-tube videos are faked and some are real. Hard telling which is which. As usual with you-tube.
Videos definitely have me freaked out. Never hurts to pray (whether they’re fake or not). Sometimes large industrial generators (like in a dam powerhouse) can telegraph similar sounds when out of balance but many of these sites are far out of range. Wonder if HAARP could create such audio phenomena? (especially since many of these are at northerly latitudes).