How to move position & keep keyframe tracking?

I have a video that is keyframed and in 4K. I am scaling it down to fit a vertical format for social media. I want to reposition the video, but if I move the position, it is adding another keyframe and not the entire video. Is there a workaround that i'm not aware that "flattens" the keyframes/video and allows me to move the video position indepedently? I know I can export the video and do it that way, but i'm just curious if there's other options. I also tried the "nest" feature and it "flattens" the video, but it's cropped into the vertical format and removes the 4K format. I hope this makes sense. Thanks!