That was an interesting video. I would like to see his theory of using that knife style in actual use.
Getting started skinning a critter usually calls for puncturing of the hide, a place to get the blade under the skin to begin the process. That knife blade, the cotton sampler, won't do that first step very effectively, easily or quickly in my humble opinion. I noticed he had a 'skeeter suckin' blood on his right hand while he was doin' his talk.