I am going to be the asshole here and say that it's just two different perspectives of the same speech and background. The instagram video (on the right) is shot from a different (slightly higher) angle from a greater distance with a different more zoomed-in focal length. For that reason the background is also more zoomed in and more cropped So much so that the top part of the window behind him isn't visible in the shot and some of the background items are cut out from the shot. The trees are look a little different too because of the zoom. But it's all the same stuff in the background.
I am going to be the asshole here and say that it's just two different perspectives of the same speech and background. The instagram video (on the right) is shot from a different (slightly higher) angle from a greater distance with a different more zoomed-in focal length. For that reason the background is also more zoomed in and more cropped So much so that the top part of the window behind him isn't visible in the shot and some of the background items are cut out from the shot. The trees are look a little different too because of the zoom. But it's all the same stuff in the background.
This video on focal length sort of gives you an idea of what I'm trying to say. https://www.youtube.com/watch?v=MYaddCXcKvQ
TLDR, not CGI but probably pre-recorded