You can easily download your iCloud photos onto your PC through your web browser. Make sure you have "iCloud Photos" turned on in your Apple settings.

Restart your computer. Plug your webcam into another available USB port. Check your webcam cable. The cable might be damaged. Test your webcam on another working computer. The above steps will let you ...

You can enable the camera on Google Hangouts on a computer or mobile device, though there are system requirements for the desktop version.