The short answer
A recorder-provided stream uses the recorder endpoint, credentials and channel map. A camera behind an isolated PoE port may not be directly reachable from the computer.
Work through the checks
Put the computer and camera on a network that permits local communication. A guest SSID, client isolation or a separate recorder PoE network can block access even when both devices have internet.
Decide whether the source is the camera itself or an NVR channel. Use the recorder address and recorder account for a recorder-provided stream, and check its channel numbering separately.
Match the requested channel or lens to the manufacturer’s numbering. A valid stream from the wrong channel can look like success while showing another camera.
Copy the RTSP path from the documentation for the exact product family. Keep the address, service port, channel and main/substream selector as separate values during diagnosis.
What to verify
Test one camera and one stream before opening a larger camera wall. Keep the camera settings unchanged while you establish whether the first live image is stable.
Sources and scope
AeoCam is available for Windows. Camera settings below describe protocol preparation, not a certification of a particular camera or a promise of every feature in every app version. Check the installed build and the Microsoft Store listing for current availability.
Vendor documents describe the camera or protocol. No physical-camera compatibility test is claimed here. Menus and capabilities can change with model and firmware.