Your enthusiasm is catching Gwass, I managed to see most of it (with a 10 minute interruption). Perhaps I've been hanging around here too long because when they started talking about a ritual site I thought 'they would say that, wouldn't they'. What puzzles me is when they talk about a period of 4,000 years almost as though there was a continuous use of the site for the same purpose. How can this be known for sure.
Will future archaeologists be saying this about churches and graveyards which may or may not have been built on top of ancient stone circles or long barrows. Quite a few of the little churches around Wiltshire have large sarsens as their corner stones - including apparently the one at Marden (although an important henge nearby there doesn't seem to have been a stone circle).
And will the Magic Roundabout in Swindon have gained a sacred status 1000 years down the line.