If you missed the live broadcast, the video's there to watch anytime. I thought it was well-presented, enough explanation for an introduction to the site for people who aren't aware of the constructions and chronology of Neolithic Orkney and more detail for those who already know the basics.
One thing that Colin Richards said I'd never heard before. Maeshowe's ditch had no causeway, therefore the mound wasn't intended as a place for the living to go, the spectacle was in its construction, and the effects of the solstice sun could have been for the occupants of the mound. It's about 5 minutes into the video. "You've got the strong possibility that once it's built, no-one's going into it" Interesting concept I think.
Something is not right. This message is just to keep things from messing up down the road