this week facebook launced a limited test program for the videos. select users will select ads for the new film divergent. the ads will play without sound just like videos from friends do now. the sound will only be turned on if the users clicks on the sound. the sound will only be turned on if the user clicks on the ad or makes it a full screen. our editor at large, cory johnson, drilled down into how this could change facebook's advertising business. >> let's talk about how this is going to work. they think they can sell this for a higher price than they have in the price. these ads could generate up to $2.5 million in one day. these would be short ads, 15 seconds. the audio only happens when you click on the ad. the hope is this would be this would be another tool in the facebook quiver of advertising tools. >> let's take a look at how facebook ad revenue has grown since its i.p.o. mobile has become a bigger piece of the pie, but what else? >> we have seen some consistent growth. the numbers at facebook are big. it is hard, in conversation, we'll