Quite agree with MichaelG. Listen to intro. on video, hear producer saying he couldn't be bothered to hump heavy rotary table on to mill to do a rounding job. Then he goes to all that trouble to make what I think is a poor mans rotary table! He demonstrates a rough and ready linisher method, which if carefully done, will, in my opinion, be adequate for most purposes. An easier way of getting better results would be to have a leadscrew controlled slider with a number of interchangeable vertical pegs, one to fit hole in work. Slider would incrementally move peg nearer to sanding belt while moving the job by hand, around the peg.
My thoughts are the whole idea is willy waving – "look what a clever machinist I am." Or am I missing something? Can't remember last time I was accused of being thick!