New vid on this site I’ve not seen before from a very close position. Shows the first explosion and subsequent fire. Fireworks going off all over the place and a very hot fire inside the building. Goes on for a few seconds before the big blast.
-- Those are not fireworks that is munitions and ordinance setting off in fire.
The tell-tale reddish-brown smoke is known to be... The 'negative' video of a missle strike for second explosion is currently suspect, so I won't post it.
But most certainly, this had nothing to do with fireworks.
For reference, there are dozens of "FireWorks" videos on youtube.