It happened at the El Toro bar on Belmont Avenue back on February 11.
The video shows a fight breaking out between two men.
During the fight, a third man intervened by hitting one person in the head with a weapon. That caused the gun to discharge, said police.
No one was hit by the gunfire.
The victim who was hit by the weapon suffered non-life-threatening injuries.
Police say the gunman was caught on surveillance video leaving the bar after the incident.
Anyone with information on the suspect is asked to call police at 215-686-TIPS.