I know, but I was trying to point out where the practice, however irrelevant to straight razor and knife sharpening, could possibly come from. It would not be the first time someone decides to copy something useful from one field into another without realizing it looses all relevance in the new context.
Chisels and plane blades are often "breadknifed" (although I don't think any woodworker would call it that) to remove chips and reshape the original curve of the tool, before completing a new bevel. But rubbing the razor edge-down once or twice over a fine hone before starting the real work on that hone, serves no purpose. If there are teeth to remove, caused by the previous hone, normal honing will do just that. There is no extra advantage. At least not anything that I can see under a scope or discern while test shaving the final edge. Quite the contrary. On a very fine slow hone, it might be almost impossible to regain the keenness lost from such a downstroking action.
We tell people to be very carefull not to lift the spine while honing, because it seriously might set the edge back. I surely am not going to advice to rub the edge over a hone before finishing it. I know Maestro Livi does it on a video that circulates here. But he also relies on a lot of CrO stropping to get his edge up to speed after that. I have honed one Maestro Livi edge, on a razor sent to me by a member that had one shave with it. Out of curiosity, I shaved with it as it arrived. It was an impeccable razor and it shaved well enough. But it was not difficult to improve the edge it caried. I don't consider that video gospel.
Bart.