The 'Will Smith in YouTube Rewind 2018' meme, specifically the 'Ah, That’s Hot' segment, stems from the opening sequence of the infamously panned 2018 YouTube Rewind video. In the scene, actor Will Smith looks through binoculars at a Fortnite-themed bus and utters the now-legendary phrase. While the video itself became the most disliked on the platform, Smith’s reaction survived as a versatile template for expressing intense approval or ironic appreciation. It is commonly used to react to things that are visually impressive, surprising, or simply to mock the forced 'coolness' of the original video. Its enduring popularity lies in its ability to fit almost any scenario involving observation and instant reaction.