"Comments are welcome because I'm not entirely sure what happens - whether the building is demolished on the insurgents or whether they manage to sneak away."

It seemed like they were spending most of the video trying to pin down the exact location of the insurgents. I think the roof they were standing on was the roof of the building that they destroy at the end of the clip. It looks like they decided that it was going to be way too dangerous to try to clear that building, so they keep it surrounded and then clear another building where they think insurgents might be (the bit in the stairwell). Finally, it looks like they destroy the building with what sounded like 25mm cannon fire from either a LAV or Amphibious Assault Vehicle. When they're going through the wreckage at the very end you get a brief glimpse of one the mangled bodies of the insurgents.