AH HA!!!
https://thesovietarmourblog.blogspot...72-part-2.html
The video below shows a T-72B in Grozny retreating with some of its external sponson fuel cells alight. As you can see, the tank is not disabled by the fire and is perfectly capable of moving under its own power to a safe location where the crew can put out the fire with the fire extinguishers carried inside the tank.
Thats why that one was burning in that video in Ukraine the external fuel cells were ruptured