An increasing number of blog posts in the rss reader come with video clips. I don't watch them and have the volume on my computer turned permanently to "off" (being a victim of ever-increasing noise pollution). What made me watch the example at this link? I don't know, but it works fine on silent. All John Battelle ("king of search") says about it in his post is: "I love it that this was done by a professor of anthropology". Go on, take a peek -- I loved it too.