Jimmy Donaldson, a.k.a. MrBeast, is best known for high-production spectacles like "Beast Games." Emma McIntyre/Getty Images for Prime Video MrBeast's next growth act may come from AI-produced videos. Jimmy Donaldson's company is looking for someone to lead a production team with AI at the foundation. MrBeast has been expanding his company while looking for ways to save. YouTube's biggest star, MrBeast, is looking for a leader to help his company create "AI-native" productions. A job posting says that Beast Industries wants to build a new production capability in which AI is "not a tool but the foundation." It calls for someone who can help define "what AI-native entertainment looks like, develop original formats, and build systems that enable content to be conceived, produced, and scaled with AI at the core." MrBeast, whose real name is Jimmy Donaldson, wouldn't be the first creator to delve into AI. Fellow superstar creator Steven Bartlett has been making fully AI-animated shows since last year.…