The Windsor knot, also (wrongly) known as the "Double-Windsor" (a non-existing enormous 16-move knot), is the most well known knot in the world.
The Windsor is a large, symmetrical, self-releasing triangular knot. The tie was named by Americans in the 1920-30's after the Duke of Windsor. The Duke was known for his fondness of large triangular tie knots, but didn't in fact invent this particular knot. His secret was a specially tailored tie with an extra thickness of material.
There are four tie-versions that result in the "Windsor" knot; two self releasing, and two non-self releasing. This version filmed here is considered as the original (self releasing) version.
The video is to be viewed as if you were looking in a mirror.