This question is by far a background question, but if some kind sole could point me at a read I would be grateful.
In still mode the lens focuses on to the full sensor surface.
In video mode it must do the same thing.
The question is: how is the video recording handing the differences in pixels recorded, eg does video 'simply' bin pixels? And if so is there an advantage in S/N, ie more captured photon at each site.
As I say, a background question.