Right now it seems that you can only set this on a server level, turning it on means any user on any device gets the trailers, codec and custom intros, etc.   I would love to be able to have the cinema intros turned on and play trailers before movies I watch in our dedicated viewing room, but unfortunately others who use this setup don't like playing trailers and would prefer to get straight into the movie. So having it enabled means they have to put up with watching/skipping (if you can skip)