All videos posted are meant as "teaching" tools, it would seem to me anyway.

In most videos in which a trailing shuck is used, the "instructor" makes two cuts: the first to cut the shuck to desired length....the second to remove the remainder of the strand of material from the hook shank.

A great production type tier like Arrick makes only the second cut.

The length of the shuck is determined at the time of tie down, thus eliminating one step in the tying.

Here's a link to the X2-Caddis video.

http://youtu.be/UG081P-CJAM