Before you start any of this you need a media server and a media extender. A media server is a program, such as , , or , that enables you to "broadcast" your videos to other computers and media extenders. A media extender, in turn, is just a device, like an , the and most 2011 and newer Blu-Ray DVD players, such as a , that lets you view video from your media server on your TV.
Most, but not all, of these programs and devices support one version or another of the Universal Plug and Play Forum's () Digital Living Network Alliance (). In theory any DLNA server can transmit to any DLNA media extender.