From the above: Over half of YouTube users use the site to work out how to do things they’ve not done before This is one of the undersung advances of the web

From the above: Over half of YouTube users use the site to work out how to do things they’ve not done before This is one of the undersung advances of the web - it's become more than access to the worlds knowledge (like some uber library) but has become a new means of transmitting learning. On the other side if one could workout a way to identify a product related to this "new thing to learn" the retargetting value would be huge