YouTube viewers have to sit through 30-second ads on videos from the site’s biggest partners despite the ban on the long-form commercials. YouTube video clips in shows from NBCUniversal, Viacom, Turner and other networks still run some 30-second pre-roll ads, even though the Google-owned site said it would stop serving them. Brands, including Time Warner, Verizon and GMC have been among the big ad spenders still running the longer spots. Early last year, Google announced it would stop showing 30-second ads that don’t have skip buttons, because viewers generally hate the lengthy intrusion, and instead it would push 20-, 15- and six-second ads. The change took affect in January. Continue reading at AdAge.com

Source: AdAge Digital YouTube's 30-second ad ban not exactly working