For several months in 1986-87, Network 21 was a pirate television station in the UK that broadcasted coverage of avant-garde art and fringe culture for 30 minutes every Friday evening. The fantastic content included the likes of: Warhol films, a post-punk fashion show by the BodyMap label (above), interviews with Sonic Youth (video below), Derek Jarman, and Genesis P-Orridge, a William S. Burroughs reading, and concert footage by the likes of Diamanda Galas and Einstürzende Neubauten. Sigue Sigue Sputnik's album "Flaunt It" included an advertisement for the station.
Raided more than once, Network 21's goal was to see the UK government use a "similar approach to TV as has been afforded to radio, for the BBC and ITV to release their monopoly on frequencies and make some available to the community."
More background here: Network 21 (Wikipedia)