Something being ejected in the shockwave, which you can see. Then the smoke from the ensuing fire.
Exactly right. The angle on the video is so high and far away one can't possibly expect to see the actual explosion which is down on the street behind the buildings. Being a crappy video with no color doesn't help either.
What we're probably seeing is the immediate aftermath of the explosion-- some type of debris being launched followed by the smoke plume from the explosion below.