The Explosive sounds occur during the phase of collapse (
sorry about the clinical term) shown in the photos below also grabbed from the Documentary, presuming they are synchronised.
~ 4
th explosion
Final Explosion.
Simple Graphic Profile used to emphasise Bass Plosives.
Try using your own Sound Editing Suites to get further detail ... Remember, what is not there in the first place cannot be heard at all, but sound forensics means you look for specific detail to emphasise.