chatrooms are good for film nights too- me and fellow blogger james do occasionally have film nights its a bit non technical the way we do it too- we just both set a time and play our films the same time- and then chat while watching.
Incidentally there are some pretty nifty open source chatrooms.
for radio/tv stations- and a tv station could be a trailer reel for example- check out miro (democracy player).
this one I ve just road tested-
http://www.123flashchat.com/chat_module_download.html
there is a version that will integrate with these forums (vbulletin)
oh and democracy player is here-
http://www.getmiro.com/
there should be instructions on how to create a channel there somewhere to broadcast videos etc- for example shameless channel could show a public domain movie with commercial breaks featuring trailers and change the movie now and then. (swamp women would be a good movie to start with),
if I had the time and a faster net connection I would do this for you guys but this would suit someone with a bit of video editting experience.