Dual Video Output Question

Maybe a dumb newbie question, but asking:

If I have my Macbook Pro set up with dual outputs (one via HDMI and one via Thunderbolt), can I use the decks in one window and the HDMI as the output to a projector for videos on the other?

Apart from AutoMix, I can’t figure out a way to go full screen output on the Video and also use the program.

You can set up an external screen by clicking on this icon at the middle screen: