For those who didn't see this video I will briefly repeat what is been said in the documentary. Lets have a look at the formation that appeared at Rockly Down in 1996, the so-called 'Harlequin'. It is easy to reconstruct this formation. After a few reconstruction steps we get the situation as shown in the first diagram. Notice that nothing in the diagram is random.
Every element is determined by previous elements.
Now the central circle is reconstructed again, but now on a different place. Diagram three is the result. A few more steps lead to diagram four and finally to diagram five. First of all, like I envisaged already, we could see that the different elements in the final design are in size and placing all determined by previous steps, determined by geometrical rules. Secondly, and this is at least of equal importance, we can see that several constructed elements cannot be found back in the final design.