I saw it but the I did not see "the hand" as you called it. I saw where she used another piece of fabric the same width as the binding and laid it there to show us that we are to only use the width of the fabric as the difference between the two ends of the binding. After cutting the ends, take the two ends, open them and sew them on the bias. Then check to see if it is right before cutting off the triangle pieces. Then sew as usual to attach the rest of the binding. I think there is a You Tube tutorial you could watch. It might be from Missouri Star.