Couldn't view the vids, but the pics were interesting.
Note sure quite how useful such tests are, but I guess there's a school of thought out there that enjoys this sort of thing.
1.Full tang
2.A guard(even a small one)
3.Micarta or G10(grippier handles)
1. Full tang khuks are also available, they're known as
chiruwa khukuri. When folk here refer to the "CAK" for example, it's an abbreviation for the Chiruwa Ang Khola.
2. Hmm, the odd "True Villager" khuks that have been turning up now and then are about all there is in the line of khuks with guards right now.
Given that the khuk is predominantly used in a swinging motion, though, a guard probably wasn't considered necessary over the years, as it's unlikely the hand would slip onto the blade unless you're thrusting with it. They're kind of like the Filippino barong in that sense.
3. These synthetics would certainly be tougher than the traditional wood and horn. Mind you, the latter are had to come by in Nepal, where the steel for the blades themselves comes from junked Mercedes Benz truck leaf springs. But that's okay by me, since I prefer natural materials in my blades anyway. As a note, horn could be made grippier with a coarse grit of sandpaper, as many here have noted in a myriad of other threads.