This guy is advocating an OTT swing. Using his definition Sam Snead is a good example of OTT and many great golfers do have a hand path that was over their back swing hand path. Bobby Jones, George Knudson, Tom Watson, Bernard Langer, Ray Floyd to name a few.
I think many think of OTT as having the downswing shaft plane being well over the backswing shaft plane and a steep outside in path. If you use hand plane then many golfers are over the top. He advocates an inside takeaway as well.