This was a straight to VHS children's movie, I believe, live action with puppets/costumes of three monsters/goblins/demons who sneak out out of their world/dimension because there was an evil queen/sorceress. They hide out as puppets on a kid's TV show, and the host (elderly man) knows their secret I think. Son of host, or intern (?) discovers the truth and helps monsters escape evil queen. Anyone know what this is?