ASMR video; sound-fetish content
Refers to videos or audio content designed to trigger ASMR (autonomous sensory meridian response), often featuring whispering, tapping, or other soft sounds. The term フェチ (fetish) is used loosely here, not in a sexual sense.
I often watch ASMR videos before going to sleep.
She likes ASMR, and is especially fond of ear-cleaning sounds.
Compound of 音 (おと, 'sound') and フェチ, a clipping of フェティシズム ('fetishism'). The term emerged in online communities to describe a genre of relaxing sound videos.