feat: Enable v4l2 exclusive capture
Should enable Chromium to see the video device, according to https://github.com/umlaeute/v4l2loopback/issues/78#issuecomment-70320902.
Should enable Chromium to see the video device, according to https://github.com/umlaeute/v4l2loopback/issues/78#issuecomment-70320902.