Florida Building Collapse Was from explosives - 911 again

Compare the two Surfside videos and decide for yourself

This is
Video two: 7/4 Demolition

Video 1 of the soo call "Natural" collapse located here

https://rumble.com/vjomtn-florida-building-collapse-video-1.html

Why is there flash explosions?

Why do they both collapse into their own footprint?