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Knife shaving is doable but not easy to keep up, and not really worthwhile. The edge geometry of pretty much all knives is suboptimal for shaving, regardless how sharp the edge itself is. It needs honing more often and forces a steeper angle relative to the skin in order to cut close.
The curve/belly of a blade can also be a risk, and generally due to uneven pressure on the skin, can result in a few extra "weepers" (as you seemed to get in your video) and patches of irritated skin. Risk goes up a lot if you do a complete 3-pass shave.
I've shaved with a knife before too and I don't think it's "mad"...it's just not the ideal tool for the job. Do it 5 or 6 times and your skin adjusts to it a little, but it never becomes particularly pleasant. I'll stick with my Feather Artist Club instead.
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