Originally Posted by PP Mguire
Shouldn't you be able to disable the screen in settings while watching your movie?
I don't know how to do that, I have basically got a black screen saved it as a jpeg which I open when in watching movies. Nothing technical about this I know but it does the trick. Due to it being the main monitor on the iMac I think this has something to do with it not disabling I may be wrong though.
Just also want to say thankyou to everyone for the advice.