The incident happened just before noon Monday in the vicinity of East 149th Street and Brook Avenue.
Authorities say a teenage boy approached 87-year old Guillermo Terron and sprayed him in the face with pepper spray.
He did it twice and then ran away.
The victim was transported to an area hospital where he was treated and released.
The suspect is described as a black male approximately 16 years old, about 5-foot-8 and weighing 200 pounds.
In the video, the young man is seen in a red down coat. He stops and without warning, douses Terron, leaving him dazed, confused, and in a tremendous amount of pain.
"He sprayed you?", we asked. "Yes, in my face and my eyes, I was burning," Terron said.
Burning his lips, he tells me, an intense stinging sensation that made him double over in pain. He's now recovering at home, but Monday, after the vicious assault, Guillermo was rushed to the hospital.
It happened as he walked up to his son Enrique's home to visit his grandchildren, when the suspect lashed out.
Enrique's own security camera caught everything, a surveillance system he says he put in just a year ago to keep his kids safe.
The strangest part: ('Did he say anything to your dad?') "No, he was on the phone, the guy was on the cellphone."
A cellphone he never put down, even as Guillermo dropped both crutches he needs in order to walk.
Anyone with information is asked to call Crime Stoppers at (800) 577-TIPS (8477).