How do Chinese cameras work?

Question

CCTV

Hello, please explain how Chinese cameras work: the camera is connected via wifi or 4g, I scan the QR code with the application and the application receives the stream from the camera. At the same time, the camera is on one network, the application is on another. How does it work and how can you repeat it yourself? Thanks in advance.

Answer 1

Most likely, the broadcast goes through the Internet, through some third-party server.
And in qr is encoded the address of the site where you can see your broadcast

Answer 2

It's called "Cloud", it's also "Cloud". Used by all equipment manufacturers. The camera and the client connect to the same server and the broadcast goes through it.
Well, how to repeat ... Program this logic yourself and upload the firmware to the camera :)