This is a nice Mayfly Emerger pattern. Notice a couple things that are not offered up during the video, that lend to the success of the fly: The Krystal flash tail (notice the one thread wrap behind the tail segments that helps lift the tail upward and away from the bend; the biot abdomen, which provides a nice segmented abdomen (how the biot is tied in determines how the body will wrap…segmented or smooth); the CDC wing/legs were at first maintained in a paper clampbefore being inserted into the dubbing loop and spun (that is not evident in the video to the untrained eye). I think those few clarifications will make the clip more understandable for the beginning fly tier.
“Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be
satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience.”