Look up what HEAT does. Then apply your physics degree to it. If you still don't have an answer, then I would recommend returning your degree for a refund.
Nothing happened to the tank in the first video. Didn't check the other videos, so I don't really care.
Trouble.
nationalinterest.org
For all the videos coming out of the Syrian civil war, a one minute, 31-second clip of a U.S.-made TOW missile slamming into a T-90 tank got more attention than most. In the video uploaded in February, Russia’s most advanced operational battle tank met one of the United States’ main...
warisboring.com
Otoh:
German Leopard-2 Tanks are often considered one of the most powerful main battle tanks in the world. But how did Leopard-2 Tanks operated by Turkey fare against ISIS in Syria?
eurasiantimes.com