Hundreds of TV channels are now available, and digital video recorders make it easy to watch shows whenever you find the time. Still, the advances have done little to end the refrain: There's nothing on TV.

By MAY WONGSAN MATEO, Calif. (AP) -- The promise of Internet-based video has long been hamstrung by copyright and piracy worries, slow dial-up connections, technical challenges and consumer disdain for watching blotchy videos on their home computers.