The video is a lot more powerful than the picture. The tank tries to nudge him out of the way but he just refuses to move. So the tank backs up and tries going around him and he steps aside to keep standing in front of the tank.
To this day we literally don't know who he is. Just some ordinary guy walking home with bags of groceries.
Whats really messed up is that the government later used that footage as "proof" that the PLA was using restraint.