My main trigger is watching someone concentrating silently on a mundane task (writing, drawing, ironing, cleaning, doing a puzzle) and them not being aware that I am aware of what they are doing. I also find sometimes that having a haircut can produce the same sensation. I also find that the feeling can sometimes be accentuated by gently rubbing the back of my neck with something like a pen or the end of my glasses. I haven’t yet found a video that works as a trigger – it needs to be there for real and even then doesn’t and won’t happen “on demand”.
Austrian writer Clemens J. Setz suggests that a passage from the novel Mrs. Dalloway authored by Virginia Woolf and published in 1925, describes something distinctly comparable.[25][26] In the passage from Mrs. Dalloway cited by Setz, a nursemaid speaks to the man who is her patient 'deeply, softly, like a mellow organ, but with a roughness in her voice like a grasshopper's, which rasped his spine deliciously and sent running up into his brain waves of sound'.[27]
Many of those who experience ASMR report that some specific non-vocal ambient noises are also effective triggers of ASMR, including those like the sound of rain, fingers scratching or tapping a surface, the crushing of eggshells, the crinkling and crumpling of a flexible material such as paper, or writing. Many YouTube videos that are intended to trigger ASMR responses capture a single person performing these actions and the sounds that result.[15]