I have to laugh at the explanations and excuses for bat handle torque.
The box grip is usually accompanied by a swing with the hands facing up and down. This by its very nature is inferior.
Look at the Aaron clip. His hands are facing sideways allowing the greatest range of motion in the wrists. This along with the 'knocker knuckles' grip exerts the greatest bat speed.
What you are endorsing is a bent elbow half swing that would only allow home runs to be hit by the largest and strongest of batters, or brute force swing.
The science that you claim along with the pseudovideo evidence is inferior.
It is not only inferior mechanicaly but further inferior biomechanicaly.