This was posted on the Boatanchors list a while back: "Colossus at 70" Colossus and the breaking of Lorenz/Tunny, The National Museum of Computing, Bletchley Park, Buckinghamshire, England. It was made on Feb,5, 2014, and there have been only 1,100+ views on you tube... http://youtu.be/QcaHpvznC7g