The clip comes from How the Grinch Stole Christmas, the 2000 live action adaptation starring Jim Carrey as the Grinch. In the film the character stages scenes like a demanding director, complete with film set language about checking the gate and moving on after a take. Short extracts of Carrey's emphatic lines later circulated on soundboards and in edits, where brilliant became a reusable shorthand for over the top approval. Its Christmas movie origin and distinctive voice keep it recognisable far outside the full scene.