I’ve been doing a little bored lockdown investigating of this specifically into the videos of loud sounds and bangs etc.
The videos and incident are all said to take pace near Mage in Brazil and the specific videos of noises are apparently from Raiz Da Serra and possibly Pau Grande.
There is what appears to be a military ordnance arms factory located in Raiz Da Serra “Military Material Industry of Brazil Imbel”
Indústria de Material Bélico do Brasil Imbel
https://goo.gl/maps/hwns1Phm3ju3Fff46
In the original post’s Youtube video the section that starts at 0:58 is filmed from the gates of this factory ... Read even more