In July 2008 in the United States, approximately 91 million viewers looked at nearly 5 billion videos on YouTube.

This came via email from PDF. It is a statistic that I use in presentations.  According to this the YouTube network is more active than I have been giving it credit for:

… currently pouring onto YouTube alone — about 200,000 three-minute videos added every day — is the equivalent of 385 always-on TV channels. In July 2008 in the United States, approximately 91 million viewers looked at nearly 5 billion videos on YouTube.

Amazing. This can only be organized by the network of viewers filter those 200,000 videos. 

I am looking forward to PDF this year.