>> mtv did nothing but play current music videos all day long. so let me get this straight. you turn on the tv, and it's like the radio? >> i'm martha quinn. the music will continue nonstop on mtv music television, the newest component of your stereo system. >> when mtv launched, a generation was launched. 18 to 24-year-olds were saying, i want my mtv. i want my mtv videos. i want my mtv fashion. >> yo. >> mtv was the first network really focused on the youth market. and becomes hugely influential because they understand each other. the audience and the network. >> mtv had a giant impact, visually and musically, on every part of the tv culture that came next. >> freeze, miami vice! ♪ >> friday nights on nbc are >> friday nights on nbc are different this season thanks to "miami vice." it's a show with an old theme but a lot of new twists. described by one critic as containing flashes of brilliance.