"I'm on Two and a Half Men and I don't want to be on it. Please stop watching it," he says in the online video. "Please stop filling your head with filth. Please. It's, you know, people say it's just entertainment."
He adds: "Do some research on the effects of television and your brain and I promise you you'll have a decision to make when it comes to the television and especially with what you watch on television. It's bad news. It's bad news."
Warner Bros Television, which produces the show, and CBS, which airs it, have made no comment.
In Two and a Half Men, which has run for nine seasons, Jones is the underachieving son of an uptight father, played by Jon Cryer.
The series originally starred Charlie Sheen as the womanising uncle of Jones's character.
But Sheen was fired in March last year after a bizarre rant against the show's lead writer, and Ashton Kutcher replaced him.