This link to an online video was sent to me by the teacher of a course I am currently studying.
http://potw.news.yahoo.com/s/potw/63302/high-wire-act

This clip made me realise the value of online video hosting as a way of sharing creativity and resources. Walter Lewin’s video lectures were very expensive to produce, but the generosity of putting them on the Web allows them to be viewed by a large number of people across the world. Nobody has to buy a copy, there are no storage issues (although links may be ephemeral), no licences to negotiate, and no registrations. MIT (Massachussetts Institute of Technology) includes video content, such as Walter Lewin’s lectures, on its Open Courseware website. http://ocw.mit.edu/OcwWeb/web/about/about/index.htm
It is nice to see people sharing!!