How can I check if my RTSP address is valid?

Install VLC player first. Open VLC player. Go to "File" - "Open Network" and enter the RTSP address of your camera. If you see a video stream from your camera, then the address is correct and you can use it to connect the camera to SafetyRadar. If you see an error, it is possible that you did not enable RTSP on the camera or it was not configured correctly.