1. A method of controlling access by a computer to a video server, comprising the steps of: sending a request from a client computer to a video server over a network; receiving from the video server a unique number stored in the video server, wherein the unique number is received by the client computer over the network; determining that access to the video server is authorized by comparing the unique number received by the client computer to one or more authorized unique numbers; in response to the determination, obtaining at the client computer one or more images from the video server; and displaying the one or more images on a screen display of the client computer.