The first intentionally labeled autonomous sensory meridian response (ASMR) video was posted to YouTube on March 26, 2009, ...

These videos, to varying degrees, all have the ability to produce autonomous sensory meridian response, better known as ASMR. In a nutshell, this refers to a bodily response to visual or auditory ...

While you may initially question why you found such a video oddly satisfying or why it triggered a strange tingling sensation your neck or limbs, you've just discovered exactly what ASMR is all about.