Yay, day 4 is actually happening directly after day 3!
This video is about something about which I am very passionate. It is about how the internet is able to bring people together to work toward a common goal. So... watch, learn, and hopefully, join a group online and contribute to something bigger than yourself in a way that was not previously possible.
TEDGlobal 2005: Clay Shirky on institutions vs. collaboration (TED link)
(The length of this video is 20:49.)