You must be seeing stuff I'm not then. Watching it in the highest resolution available I'm not seeing anything suspect. It just looks like a dual camera setup, likely in the oval office or another similar room. They are using professional lenses with a large aperture, hence the blurry background. They are using a large area light to give the president optimal lighting and soft shadows everywhere. I don't mean to be rude, it's just that I see accusations of greenscreen thrown around all the time here, and knowing the amount of work that goes into it, I don't see any reason to do it when you can pre-record in front of an existing backdrop. We can go back and forth on whether the video itself contains evidence of greenscreen, and I'm not saying it would be impossible to do well, but you should also be able to explain to me why they would feel the need to put in the extra effort when they have everything they need already.