Altered "Fullscreen" behaviour

[Firedrops]

I'm using multiple monitors with DisplayFusion, which splits the screen into multiple zones. If you click 'maximize' on a window, it will maximize to the zone's size, instead of the full monitor's size. This works pretty consistently across all softwares.

For example, this is what it looks like

Is it possible to alter youtube's Fullscreen behaviour to get the local "maximize" size, and emulate Fullscreen to within the size, just like how a window will when affected by DisplayFusion or similar PIP software? Maybe another software button can be added so as to not completely replace native Fullscreen.

[ghost]

I don't think it will ever be done.