The title is written in Korean as 저나챌린지2, with 챌린지 meaning challenge, and the clip circulates online as the second version under that name. No clear original source, artist or release year is documented for this upload, so it is known mainly through its use as a shareable challenge sound. Short video creators reuse it for dance copies, duets and timed edits, where recognising the format matters more than knowing who posted it first. That familiarity helps new versions spread quickly between viewers who want to try the same routine themselves.