Using an Out-of-Control Car to Calculate π.

From a channel Lumen includes in full: Matt Parker (Stand-up Maths) investigates real mathematical questions, from shapes and sequences to election statistics and new results, running the calculations and code on camera and often with collaborating mathematicians.

A 17-minute video from Stand-up Maths's catalogue; the title names its topic.

Video by Stand-up Maths, played through YouTube's embedded player.