Bruh that's deep circulates online as a standalone reaction clip on meme soundboards and in short-form video edits, where its appeal comes from how easily it fits almost any moment of fake profundity. Creators reuse it because the phrase itself is familiar internet slang, instantly signaling that something is either trying too hard or stating the obvious. Its brevity makes it easy to drop into TikTok clips, Discord jokes and YouTube reaction edits without breaking the flow, which has kept it in rotation long after many longer meme sounds fade.