It’s quite easy. You don’t have to run an exec or any scripting like that.

Simply set your secondary display to be extended desktop in windows display settings

Then set ARC to not maximized. So the program looks like a window that you can move around. Then drag and position the ARC window so it spans both monitors across the extended desktop

Now place your controls anywhere you need. This means placing your video player on one desktop and drag it to fill the screen. You’ll have to unselect auto arrange controls in the add control menu.

That’s all it takes. Everything saves with your project.

Thanks. The extended display will do what I want