THE sluice-gates were yanked open by the Hinduja-owned cable-delivered movie channel, Cable Video Opera (CVO). The 'premiere' of San-jay Leela Bhansali's b-o dud Khamoshi last July clicked famously on the boob-tube and the trickle quickly turned into a torrent. Sony Entertainment Television followed the CVO example with the telecast of recent releases like Judaai, Rangeela, 1942: A Love Story and Hum Aapke Hain Koun. Now, Star Plus has jumped on to the Bollywood bandwagon. And Zee TV is waiting in the wings to tap the unquenchable thirsts for potboilers in a movie-crazy nation.