With the first drop-down menu you can select the video capture device to use with easymeeting™, among all those installed in the PC used.
The second drop-down menu allows you to select the resolution of the images captured by the video capture device of your webcam.
Clicking on the Configure button in the video section, you will get the usual window containing the advanced video features:

Properties of the webcam – Device settings
Within the video properties window, in device settings, you can change the brightness, contrast, hue, saturation, white balance and offset the black.
In the Advanced tab, however, you can set values (eg. Against the flickering, or the optimization of the image), taking care to remove the checkmark to the "automatic gain control" if it was set.

Properties of the webcam – Advanced
Once you've made the necessary changes, you can test the video device using the apply button that allows you to verify that the device is properly installed and optimally configured.