The wood in the video is green. If you look at it on a big screen there’s steam coming off the cutters, and major water running out the front.
I think a scissors action would be the most efficient, as Thierry envisions, 2 matched contra rotating cutters. But I expect the real difference would be small, as the wood is fracturing along the grain, relieving the cut as it goes .
And really, to get material to feed properly centered 3 cutters may be necessary, like an old school pencil sharpener.