if I try to put FullScreen, this page with the button on bottom right of video, it change nothing.
And in this page, I can't change the HTML SELECTION (Country, Category, Sort by) lists.
Very often, you want to use OBS to just record part of the screen. Figuring out and configuring the exact location, and especially the exact size, is a chore.
Why not do it the way screenshot tools like Faststone Capture do it?
User invokes function to select screen area.
OBS takes screenshot...