Hulu is again jumping on a production from digital studio RocketJump, picking up its scripted sci-fi anthology series “Dimension 404” in a deal with Lionsgate. “Dimension 404,” inspired by the web’s “404” page-not-found error code, will premiere exclusively on Hulu. In December, Hulu debuted half-hour docu-comedy series “RocketJump: The Show,” based on the action-comedy short...