This video was funny at least. Notice when he showed his hand after actually using the knife. He really should have made a proper handle for it!
There are actually a bunch of videos on YouTube showing "the sharpest knife" made of unusual materials. None of them have much impact on normal knives or knife use. It's more for fun.
As far as ASMR, or "Autonomous Sensory Meridian Response", it's a little more involved than "evoking an emotional response". There is a specific reaction that occurs in some people when they hear certain kinds of sounds. Some people describe it as tingles or a chill that runs along the spine. Small children sometimes discover this effect on their own and play games with it. It can be evoked by quietly whispering in someone's ear, or making light crinkling or tapping noises close to the ear. (It is in the same ballpark as sensations from very light stroking of the skin with a feather or blade of grass.) This effect, combined with a generally relaxing presentation, can be both calming and gently stimulating. There has actually been some legit interest in ASMR presentations for therapy.
The following video is a "trigger test" as opposed to a full presentation. It quickly runs through various sounds that tend to generate ASMR in people, so you can see if any cause it for you. (You'll want to use headphones with the volume up.)