The Youtube posting writes:
Karl Fisch, Scott McLeod, and Jeff Brenman have launched a "Do you know" series of videos visualizing data on YouTube since 2007.They launched the latest version of " Do you know" on September 14th. The video was created together with Xplane and The Economist for their Media Convergence forum in October 2009 and it illustrates the changing media landscape, from the decline in traditional media to the continuous rise of social media and mobile. After some days, the video has become a YouTube Hit with more than 130,000 views.
Now you know. :)