The writing in this article helped me understand ASMR, but the videos don't seem to be the best examples (it doesn't help that these examples aren't very long). The best examples of what they are talking about to me would have to be the crackling of a fire. Also, whispering in my ear gives me intense tingles, but part of that may be the vibrations off of my ear drum.
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.