You lack of the knowlodge of anti-tank missile, the Tow fly on the top of tank ,the most weakest armor of T72. and release the shaped charge Heat ammunition, puncture the armor of T72, firing the shells in tanks. So t72 return to parts.
Something is very fishy in that video. Are you sure that T 72 wasn't filled with explosives which were detonated remotely?
And T 72 wasn't design to be good, it was designed to be cheap and easy to produce. T 62 and T 80 were designed to be good.