The beocenter 2 is a dual function item. It is both an audio master and a video device. The audio master plays radio and CDs through its own power link speaker connections or through the master link to a television or another audio slave in another room.
The DVD function however plays locally through the SCART/s-video/composite video and RCA stereo/digital audio ports. These connection must be made directly to the TV in order to watch or listen to DVD.
I believe it was set up this way so that someone could watch a DVD in the main room, while someone else could listen to radio (or net radio/net music depending on one's set up) in another.