Yes, a wifi connection isn’t necessarily required of security cameras to function as terms like ‘IP camera’ and ‘wireless camera’ might imply.
Alfred Camera: Use Your Old Phone Or Tablet As A Home Security Camera
AlfredCam Plus Home Security Camera – AlfredCamera
Roku Home Security Cameras—Monitor Your Home From Anywhere
How to protect your property with security cameras without Wi-Fi
Best Security Cameras without WiFi or Internet Solutions [NEW]
eufy Security Cameras with HomeKit Secure Video to Replace Wyzecams - Podfeet Podcasts
Is There a Security Camera That Works Without Wi-Fi?
AlfredCamera (@AlfredCamera) / X
Alfred Camera app that turns old cameras into cloud based security cameras. Secure? : r/homeautomation
Why Does My Security Camera Keep Going Offline? - Casa Security
How to turn your old phone into a home security camera for free - Quora