Problem when maximizing video window in 2nd screen

Hello...

I have a question and I need a solution.

 

It turns out that I have open maximized rekordbox, then I activate "video" and drag so that the videos are seen and when I maximize the video window, rekordbox is in window mode in the macbook and it bothers me enough to work in that way, since I want to work with the maximized program.

 

Any solution???

 

Thank you so much