Here's a trailer, from the RI Channel website:
http://www.richannel.org/christmas-lectures/2011/meet-your-brain#/the-christmas-lectures-2011--trailer
The Christmas Lectures 2011 - Trailer from The Royal Institution on Vimeo.
There are lots more videos relating to the Christmas Lectures on the RI Channel, including some snippets recorded well before the lectures themselves. Worth a browse.

The last time brainy stuff was the subject of the Christmas Lectures they were delivered, if I remember correctly, by Susan Greenfield. Presumably she went on to carry out rigorous, detailed research — fully documented in respected peer-reviewed scientific journals — into the effects on the brain of activities such as video-gaming and internet social networking. Or something like that.