Advertising is going through a huge sea change thanks to social networks and video networks like YouTube. This isn't your father's TV ad network system anymore. One of the most innovative companies in the new advertising spaces is Involver. They build campaigns for some of the world's largest and best-known brands. I found this so important to study that I split the conversation I had with Involver's CEO, Rahim Fazal, and its CTO, Noah Horton, into four parts. Here's the fourth of those four. Start with Part I.