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