The video shows an elderly man being punched in the face by a young man in December 2015.
The elderly man was getting ready to cross Rosa Parks Boulevard in Paterson.
A 16-year-old, who was heard in the video encouraging the aggressor, turned himself in to Paterson Police on Saturday evening. He is being charged with aggravated assault and endangering an injured victim.
The 17-year-old attacker is still being sought by police.
Police Director Jerry Speziale released a video statement Friday on Facebook to the public about the video.
The condition of the victim is currently unknown.