Markiplier is the online name of American YouTuber Mark Fischbach, who launched his channel in 2012 and became widely known for Let's Play videos, especially horror games like Five Nights at Freddy's and Amnesia. Short audio signatures linked to creators became popular as channels grew, and this theme came to be shared by fans searching for his outro song. As soundboards and meme editing spread, the clip moved beyond his own uploads into fan videos and reaction edits, where a few seconds are enough for viewers to identify the reference.