Is your webcam already in use ?
- Your webcam can not be used by two applications at the same time
- Check that no ther application is using your webcam
Did you allow access to your webcam ?In the Adobe Flash Player Settings, ensure to check "Allow"
More info : http://www.macromedia.com/support/documentation/en/flashplayer/help/help09.html
Chrome users, allow site access to your camera
More info : https://support.google.com/chrome/answer/2693767
Choose the right webcam
- If you have more than one webcam connected, try to choose another one
- You may see another device detected as a webcam, like a tv tuner, or video acquisition card