Terrent Tao's video description: In this experiment, I took a statement in universal algebra that a collaborator of mine (Bruno Le Floch) on the Equational Theories Project had written a one-page human proof of, and set the task of formalizing the proof in a very low-level, "line by line" fashion, with heavy reliance on both the large language model-powered code completion tool "Github Copilot" and the dependent type matching tactic "canonical". The proof was formalized in about 33 minutes.