An editor for YouTube’s most popular creator, MrBeast , has been accused by the predictions market Kalshi of insider trading on the platform. After an investigation, Kalshi said it “found reasonable cause” to believe that this editor, Artem Kaptur, had used non-public, insider information about MrBeast videos to inform his betting on matters involving the MrBeast YouTube channel. Prediction markets like Kalshi and competitor Polymarket allow users to place bets on a wide variety of future events, like who will win a political election, how many albums a certain musician will sell in a week, or when the sequel to a popular film will be announced. Kalshi did not disclose the specific bets that Kaptur placed about MrBeast, but some markets on the platform allow users to bet on what words the creator will say during an upcoming video — private information that a video editor could feasibly influence.…