The method he says does not work very well is the one that most people use.
One of the methods that does work really well is the Arkansas Stone that has three different stones.
You start with the roughest, then work your way to the smoothest.

Image By: Deer Meat For Dinner Via YouTube
You basically initiate the knife in the direction that you cut, which is diagonal.
The very best method, the YouTuber concludes, is to use a belt sander.
All the different belts are described in great detail, and how they work on knives is thoroughly explained.

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This is a great video, I learned so much.
