This post I did a couple of months back might help you understand the simple maths behind resizing and centring an image or video.
Key-frame zooming, motion & objects outside the screen area
@Hudson555x I have to agree with the above comment from @jonray . However modestly you may rate yourself, your willingness to try to help others is a credit to both yourself and this forum. If I ever met you in RL I would shake your hand and thank you brother.
