Yep definitely legit, I signed a release when I did a tv show once with this exact same statement
"I hereby grant to Fox, its affiliates, successors and assigns, the right to exhibit, perform, distribute, sell, lease and exploit the Related Material separately and/or as part of a new program and/or in connection with the Picture in any and all media, whether now known or hereafter devised,
in perpetuity throughout the universe".
The "throughout the universe" thing is what made it so funny (to me)