The incident happened at 8:00 p.m. on Wednesday, April 17th in the 1700 block of Diamond Street.
Philadelphia Police say 25-year-old Domenic Pesce of the 1500 block of Locust Street in Philadelphia is the man seen in a heated argument with a 20-year-old man.
Police say Pesce suddenly punched the 20-year-old in the face, then punched another person who tried to intervene.
The video shows a group surrrounding both men and then Pesce appears to kick someone on the ground before calmly walking away.
Police say the 20-year-old man suffered serious injuries, including a broken jaw.
Pesce is described as six feet tall, 180 to 190 pounds with short, dark-colored hair and a tattoo on the back of his right arm.
Police say Pesce lists a secondary address in the 200 block of Montgomery Drive in Mantua, N.J., and is known to frequent the Temple University campus.
Anyone with information is asked to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through PhillyPolice.com.