The short answer
Use the official path for the Amcrest product family you own. IP cameras, recorders and Smart Home products must not be treated as one universal RTSP endpoint.
Work through the checks
Identify the camera by model, hardware revision, firmware and MAC address. Keep this inventory separate from passwords; two devices with similar names may expose different protocols.
Use the Amcrest path for the exact IP-camera or recorder family. The official guide documents different endpoint patterns; a working path from another product is not a universal template.
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.
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
Use the camera’s local protocol account. A cloud app email address is not necessarily a valid RTSP or ONVIF login. Grant only the viewing or control permissions actually needed.
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.