There were several factions in open rebellion around the city, and exchanges of fire within the city from organized armed militia and the PLA, but in the square itself the wasn't much active fighting beyond regular protest violence.

The tanks were leaving the square, but there was still fighting going on. Who knows exactly what he was saying, but he stopped tanks from leaving the square and talked to the drivers, then was moved out of the road by civilians on bikes.

What we know for sure is that the tanks did not run him over, they spoke calmly with him when he climbed up to the hatch, and he was taken away by civilians.

We also know that he clearly lived in the area (carrying bags of groceries) had likely been seeing the fighting the previous days and also seen the PLA come in with tanks. He clearly felt safe enough with the tanks nearby to go out and get groceries, and is now, with the groceries he just purchased, speaking with the tank drivers as they leave the square.

If you take this video at face value, it seems like an instance of someone actually asking them to stay because it would mean militia forces would be less likely to start conflict near his home.