Check your camera's manual or app for its RTSP address. Typical ones:

• rtsp://IP:554/stream1 (TP-Link Tapo; set a "camera account" in the app first)
• rtsp://IP:554/h264Preview_01_main (Reolink)
• rtsp://IP:554/Streaming/Channels/101 (Hikvision)
• rtsp://IP:554/cam/realmonitor?channel=1&subtype=0 (Dahua / Amcrest)
• http://IP:8080/video (MJPEG, e.g. phone webcam apps)

Cloud-only cameras (Ring, Blink, Nest, Arlo) don't offer a local stream URL, so they can't be used here. Credentials can go in the boxes above or in the URL (rtsp://user:pass@IP/...); either way they're stored only on the board.