Device List: this shows the list of all available capture devices

Capture Interface: select one of the available Capture Interfaces

Number: select the number for the camera - Experts only

Add from folder:select a previously stored configuration from any folder - Experts

ReRead Devices: if you plugged a USB interface and it's not showing up in this list, hit ReRead Devices to update the list

Cancel: aborts this selection form

OK: add the selected capture interface