CTSCameraViewer User's Guide
First of all you should click on (1) button and select a capture device. After that you can use (2),(3),(4) buttons for a general preview and (7),(8) buttons for recording video to a hard disk. (9) button is used for making snapshots and saving it to disk. (10) button is used for uploading a recorded video to YouTube. (5) and (6) buttons are used for zooming.