I’m not a military expert, but here’s my interpretation of what went down:
A large group of snackbar terrorists is seen heading towards the wall on the left but most quickly abandon the idea and retreat. My guess is they spotted a tank and realized that death was imminent. One explosion takes place behind that wall at the beginning of the video, then there is a sound of what could be fire from the tank mounted machine gun and then there is the epicly precise blast that wipes out a bunch of the terrorists.
The blast seems too small for an aircraft shell but too precise for an artillery round to hit twice in the same spot. Therefore my guess is it was one of the tanks similar to those seen in this footage.
BTW – I’ve never been involved in live combat, but it seems contra intuitive to me to run towards the area that was just hit with a round. Basic logic tells me that a tank is likely zeroed in on that spot so running there immediately after the first explosion would be like running into the line of machine gun fire. Unless of course that first explosion was triggered by the terrorists who thought it wiped out the soldiers and ran toward it to kill the wounded?
Like I said – I’m not a military expert and know nothing about guns. Correct me if I’m wrong.