Google Chrome and Firefox users, please read this!
First, ensure that you have a webcam, and a supported computer. (MAC, Windows PC, or Linux)
Follow these instructions:
Right-click on the camera screen
Choose settings
Click on the webcam
Can you see webcams on the list? If so, go through each cam and see which one works.
If there's no webcam on the list, the device drivers may not have been installed for the webcam. Please refer to the computer's or webcam's manufacturer website for details.