Download page Webcam Information.
Menu path: Setup > Accessories > Webcam Information
The Webcam Information tool reads information such as the manufacturer, model and supported video formats from a connected webcam. A test image from the camera with the chosen settings can also be displayed.
Launch Webcam Information in the Application Launcher (System).
Select a resolution and click Test in order to display the camera image.
In order to check whether the webcam is functioning in a session (e.g. redirected via Citrix HDX Webcam Redirection), open https://www.onlinemictest.com/webcam-test/ in your browser within the session (Adobe Flash must be installed).