Intro sounds like this are a staple of online video because every creator needs a quick way to signal that a clip has started. Short opening clips are commonly used at the start of YouTube videos, streams, podcasts and slideshows, where a few seconds of audio can set the tone before any speech begins. Their appeal is practical rather than tied to one show, meme or artist: they are easy to drop into an edit, they work across topics, and they give unrelated videos a shared sense of polish. That flexibility is why generic intros remain in regular use.