I got to know about ASMR recently thanks to the video that was taken down and the description felt very similar to what I've experienced since I was a kid. I used to even flaunt this as a super power when I was young. Wondering if someone knowledgeable could explain-this-phenomena / suggest-some-literature to me. Reddit probably is the right place to enquire about this but here goes nothing.

I can spontaneously generate this tingling feeling at will by moving my chest muscles ever so slightly. This act lifts my shoulders a tiny bit and results in a mild pulse descending from the back of my head that flows through the spine. Doing this continuously 3-4 times results in goosebumps in the right weather conditions.

I got a similar feeling(comparitively milder than what I could generate spontaneously) when I watched/listened-to one of the ASMR videos which made me wonder if there a way to quantitatively measure these ASMR responses claimed by people.