A clip from part one of a three part programme by the BBC called Leonardo: The Man That Wanted To Know Everything.
It was first broadcast in 2003, and was presented by Alan Yentob.
The following is a description of the programme taken from the BBC's website:
This film follows Leonardo da Vinci from his illegitimate birth to the unveiling of his masterpiece The Last Supper in Milan in 1497.
Learning his craft at the heart of the Renaissance movement in Florence, Leonardo survives arrest to win the patronage of the powerful tyrant Ludivico Sforza, Duke of Milan. While working for Sforza, he paints Madonna of the Rocks, works out why the sky is blue and becomes the first person to properly dissect a human body. He also becomes a practical engineer. The programme builds and tries out two designs from that period - an armoured war vehicle and a parachute.