FCPX Stuck Showing Preview on Second Screen

Hi,

I don't have the second monitor section selected but the video preview itself is its one window on my second screen and I can't get rid of it. This preview doesn't include the time beneath it because that's on my main screen so on my second screen it's just the video preview itself. I don't know how to disable it.

If I press the secondary monitor button it then uses the other monitor to show my video again.

Thanks.

The video below might be worth watching.

Found out the AV Output was toggled