It was pole video from MPD or City of Memphis not a private owner's security cam.
Here is an old article about MPD installing cameras on poles
https://www.fox13memphis.com/news/local/activists-find-camera-inside-mysterious-box-power-pole-near-union-organizers-home/5WCLOAMMBRGYBEJDGH6C74ITBU/
Memphis Police Department Combines Traditional and Unconventional Surveillance to Keep the City Safe
https://www.sdmmag.com/articles/92037-memphis-police-department-combines-traditional-and-unconventional-surveillance-to-keep-the-city-safe
"MPD eventually decided on a mix of all three configurations: pole cameras, cameras attached to buildings, and mobile trailers are all employed at designated spots. So far, the police department has established a network of about 600 of Hikvision’s analog and IP bullet and dome PTZ cameras throughout the city. Building exteriors, for example, are often outfitted with a 3 MP outdoor bullet camera with a body type that allows for easy mounting to building exteriors. Aside from wide dynamic range that extends the light range that the camera can capture, this camera also offers line crossing and intrusion detection features to make surveillance more effective. These features can send alerts to the police when someone enters or leaves a designated area.
The footage from these cameras, which are placed at strategic points around Memphis, flows back to the MPD Real Time Crime Center (RTCC). The RTCC is used to enhance security for city assets and infrastructure and has become a sophisticated way for the city to fight crime. It features a large video wall that can pull up live streams from surveillance cameras that have been deployed throughout the city, as well as unique software that provides instant information on recent criminal activity in a radius around a crime, existing crime patterns in the surrounding area, and a history of people with arrest records who may frequent the neighborhood.
“We have a video wall with dozens of monitors and we can pull up any police camera feed in the city,” said Sergeant Joseph Patty, who has succeeded Shackleford as the video surveillance manager for MPD. He and Director of Police Services Toney Armstrong have driven MPD’s technology program as it continues to evolve. “We have about 30 workstations out on the floor that can view the video wall or pull up any camera feed.”