UC Berkeley has begun posting entire course lectures on YouTube this month, including a lecture on search-engine technology given in 2005 by Google cofounder Sergey Brin. The lecture, Search Engines: Technology, Society, and Business, is approximately 40 minutes long and covers topics such as search and privacy, search ranking, internationalization, anti-spam efforts, local search, peer-to-peer search, and search of blogs and online communities. Check out youtube.com/ucberkeley for more videos on topics including chemistry, physics, biology and more.