9/11: an interesting video footage

Does this video reveal a controlled demolition sequence seen travelling diagonally up 20 floors to the service floors?

Does this video reveal that it is not in fact an explosion of air which is being observed, but in truth small charges in sequence seen to be exploding?

I merely present this video as an example of current conspiracy theories relating to 9/11 .... it is up to you to decide for yourself what this video footage shows.