IPTV know-how is used for video on demand , which permits a customer to browse an internet programme or movie catalogue, to look at trailers and to then select a selected recording. The playout of the selected merchandise starts almost instantaneously on the client’s TV or PC. Hybrid IPTV refers again to the mixture of conventional broadcast TV companies and video delivered over both managed IP networks or the public Internet. It is an increasing development in both the patron and pay TV markets. IPTV has been extensively used since round 2002 to distribute tv and audio-visual media around businesses and business websites, whether or not as live TV channels or Video on Demand .