What are those circles? Click here if you want to know more.
You can now watch more Farey-Ford math on Youtube!
I hope that, in addition to the french accent and other idiosyncrasies, you enjoy the math and the fantastic editing work of Brady Haran. The math videos of his Numberphile channel are really great. This video has now been viewed over 300,000 times (for whatever YouTube defines as a "view").