Well, the formula seems to work, while I haven't hadda chance to actually perform the test, I have marked up my large cardboard target with all of the incremental 'distances' that I have set, starting at the 50-yard mark.
I have set up my board having the 50-yard start at the bottom and measured per the formula for each increment of 25 yards and marked that above the 50-yard mark in a straight line (in other words, I have premeasured the anticipated POI instead of measuring while out there). I plan on using a plumb bob string to assure level when I finally get to try it out.
There are actually 2 formulas, one for MOA, which the vid shows, the other for MRAD. It's a multiplier of .03599 for MRAD.
mike