OK Work with me- I don't have a webcam, but we can do it together. This is going to lead to a proper symmetrical full windsor knot- not that sideways knot that some arses wear.
Place tie around neck-skinny side to your left. Right over left and underneath up the center and out. Take the large end in your right hand, wrap the triangle you've just created to the rear of the knot, pass the large end to your left hand, wrap the left side of the triangle and flip the large end over the top towards your chest. At this point, the large end is behind the skinny end, with the seam away from your chest. You're almost home. Take the knot in your left hand with two fingers pointing towards your adam's apple, the wide end in your right, and flip the wide end horizontally towards the left, go over your left hand, back up towards your own neck, and stuff the remainder of the tie towards your left hand fingers.
Adjust the knot until it looks nice. Length will not be correct the first time. Repeat second paragraph as needed. By the time you get length correct, you'll be well practiced, or a dedicated wearer of golf shirts.
