Computer Configuration > Administrative Templates > Microsoft Edge
Both
HKLM\Software\Policies\Microsoft\Edge
Control whether sites can capture video. If enabled or not configured (default), the user will be asked about video capture access for all sites except those with URLs configured in the 'VideoCaptureAllowedUrls' (Sites that can access video capture devices without requesting permission) policy list, which will be granted access without prompting. If you disable this policy, the user isn't prompted, and video capture is only available to URLs configured in 'VideoCaptureAllowedUrls' policy. This policy affects all types of video inputs, not only the built-in camera.