Estimate The Number Of Videos On Youtube

How to estimate the number of videos hosted on Youtube? A sample search on Google: site:www.youtube.com/watch return 1,080,000,000. By Using Youtube API gdata.youtube.com/feeds/api/videos/-/* and parsing tag (goto view source for example to do that), suggested on http://beerpla.net/2008/08/14/how-to-find-out-the-number-of-videos-on-youtube/ by A开发者_StackOverflow中文版rtem Russakovskii return only 1.000.000. He updated the figure under the page on August 2010 to an estimated 141 million to 144 million.

Any ideas?

Thanks in advance for any suggestion.

Randy