autoplay. we call it fake pre-roll.iewer getsens is a to a webpage and the video ad you would not expect to be there is auto playing off to the side or above the fold. these are often on small players . that is not what advertisers think they are buying. >> fake pre-roll is a video added a viewer has no intention , often played below the fold. how prevalent is fake pre-roll? >> it could be as much as five percent of all of the digital video market. a two hundred million dollar problem. it stems from publishers that are trying to get into the , but they don't have content. so they try to simulate it in a banner that autoclaves. plays,r never -- auto where a viewer never actually sees it. are bot nets.ere what are bot nets? >> a collection of computers that have been hijacked by viruses, essentially. and then hackers use those computers to send fake traffic s, and often it is websites playing autoclave pre- roll. -- autoplay pre-roll. buys intoe kind of the system, but when i look at this, i look at companies that do this