Hi hello guys is a generic spoken greeting rather than a line tied to one show, film or famous creator, which is why it circulates widely as a reusable intro sound. Short greetings like this are popular on video and social platforms because they are instantly understood and easy to place at the start of a clip. Its appeal comes from that simplicity: it sounds like someone talking directly to an audience, so creators use it to open content, break the ice, or add a human touch to edits, memes and compilations.