You can test your webcam using online tools or programs that come with Windows 10 or your Mac computer.

You can (and should) test your webcam and microphone setup on Windows or macOS before connecting to a video call.

Logitech Webcams As a result of my QuickCam Software write-up, I've had a couple of exchanges with the Guru from the Logitech User Forum, and one of the Logitech software engineers.