The incident happened on July 21 after the home health aide was sent to take care of the woman who uses a walker and needs an oxygen tank.
The video -- caught on the victim's Nest camera -- showed the aide whacking her with a pan and also hitting her repeatedly until she collapsed to the floor.
"It was a nightmare," said Michelle Mitchell, the victim's granddaughter. "It was horrific. It was one of the worst days of my life."
Mitchell was in New Jersey, but she was watching the ordeal on her phone as it happened because the family installed cameras in her grandma's apartment.
"It was so unreal to me, that someone could punch somebody like they were beating them down," added Mitchell.
The victim suffered bruises is sore and can't lift her arms from the attack. Doctors say they are also worried about possible blood clots.
The worker had been sent to the home by Medflyt at Home Health Care Agency.
"We're doing an internal investigation, alongside the New York City Police Department, and are cooperating with authorities," the company said in a statement to Eyewitness News.
Police are looking for the health aide worker. So far, there have been no arrests.
ALSO READ: Hell's Kitchen punching attack leaves 2 men unconscious, 1 in critical condition
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