If a device is unprotected and responds, Shodan will find it. For WebcamXP 5, the default homepage often contains specific strings like <title>WebcamXP 5</title> or "WebcamXP Pro" in the HTTP response.
This query searches for devices that have the product name "webcampxp" and version "5". webcamxp 5 shodan search work
The Invisible Lens: Understanding webcamXP 5 Through the Eyes of Shodan If a device is unprotected and responds, Shodan will find it