To begin test you don't need to download any software, just click the big green button "Check webcam" and follow the instructions.
Access to camera
By default, access to a webcam is disabled programmatically. It is necessary to provide it to check Details are written on this page.
Whether webcam works or not?
Once you have provided access, you should see video from the camera on your screen. This means that the webcam is working. If it doesn't, read information below. There are quite simple things, but they can help.