On your left, you should see the image taken by the cam in real-time (that is, with a few seconds network delay). You can click on the picture to point an object, the camera will center on it. Other controls let you change the zoom and return the camera to 0,0. The resolution control allows you to get a poor quality picture with a higher frame rate.
By the way, you'll need a browser able to handle animated GIF, frames with JavaScript enable in order to get all the stuff working.