Watching full-length TV program online is increasingly popular, say some studies. Nielsen notes that ABC.com (50 percent), NBC.com (41), CBS.com (37), and Fox.com (24) were the most watched, with other Internet-based alternatives YouTube (17) and iTunes (15) used less often.

However, old television is still the preferred delivery platform, with 70 percent of Internet user saying they watch TV online because they missed an episode on television. Some watch a show on TV, then watched it again on the Internet.