With no single well-known source behind this short greeting, its appeal comes from how widely a simple hai guys works online. The phrase is a staple opening for creators on video and streaming platforms, where a quick, friendly hello helps set tone before the main content begins. Because it is short and instantly recognisable as a greeting, it has been reused as a soundboard clip for intros, memes and edits, especially where a creator wants to sound approachable without a long introduction. Its continued use reflects that familiarity rather than any one viral moment.