Beolink wireless is audio only: No video, without a coax cable ( NTSC or PAL ).
There are a few LAN devices that can send wireless video ( TV Anywhere etc ), but the signal is subject to interference such as ghosts, nearby transmissions, and other artifacts. The technology requires a few more years of R & D, as it is subject to flaws.
None of these devices can be controlled by a Beo 4 or Beo 5; Perhaps Struer is working on this application as we speak.