Shawn Levy explains what went into filming the cameo, using a small crew and the show’s equipment. Becoming an answer to a question on Jeopardy! means that something is really popular or a hot topic, and that’s precisely what Trebek’s cameo is supposed to convey. Blue Shirt Guy is becoming a sensation in the real world, and as his fame grows, he gets the ultimate acknowledgment of his popularity, and that’s being a question on Jeopardy!.
Article source: https://www.cinemablend.com/news/2572302/jeopardys-alex-trebek-free-guy-cameo-filmed-ryan-reynolds