I get that the youtuber just wanted no trouble, but he may have really screwed himself by not insisting on a waver of liability, agreement that the existing videos can stay up (or, alternatively, compensation to replace the lost income from them), and compensation for his costs at a minimum. Handing WOTC's paid thugs the material probably didn't do anything to reduce his risk and took away the little leverage he had…
The Pinkerton employees on the other hand, were less cordial to the YouTuber. Cannon told Kotaku over email that they had threatened to get the county sheriff involved if he did not return the MtG cards. They cited statures with punishments such as a $200,000 fine and up to a decade of jail time.