To reset the camera and microphone permissions within your browser follow the steps below while on the Virtual Video/Photo Booth page.
Click on the padlock symbol located to the left of the address bar. This will show a drop down menu with camera and microphone permissions for the current page. Change the camera and microphone permissions to "Allow"
You may be prompted to reload the site to apply these changes.
Other web browsers may show a camera icon in the address bar, click this to set your camera and microphone permissions to allow.