The Mad Hatter’s Device that Fitted Charlie Chaplin

Inside London's oldest hat shop, a seventh-generation hatter explains the bowler's origins and the fitting process that has served Winston Churchill, James Bond productions, and a long line of celebrity heads. The film is as much about a family keeping a centuries-old trade alive as it is about the hats themselves.

Why it's free: Free on Great Big Story's own channel; GBS produced and posted it there itself.