So, one of the guys that filmed it had six seconds between the explosion and the sound. At a speed of sound of roughly 333m/s, that puts him around two kilometers from the explosion. His windows do not shatter. So if they report that ten kilometers away a building collapsed from the explosion, well, then the building must have been rather unstable to begin with.
Edit: After watching it again for the umpteenth time I think he had no glass installed in his windows (missing reflections). So that's not a good indicator. Still, I stand by my point, faulty as the numbers may be, at 10km distance from the explosion the house/whatever must have been quite wobbly already.