Hi there, I did not view the video of how this thing works - But as Boom Brakes go,
I will not go offshore without one - The Walder (?) works great. U can actually gybe controlled ( correctly set -off course) Just turn and tend to the fore sail(s) then ease on the control line and the boom goes over. U can also set the tension line so it goes over slowly. It is an expensive gear and U have to have a free winch for it. Therefor I made my own - A trip to the junk yard, cut the parts of Aluminum and had it welded.