How do I change animated values for multiple keyframes? In Blender 2.82 I have lots of keyframes for a camera that I want to change position to altogether at once, how can I do that? The local animation is correct, but the whole location for all of it needs to be changed, like add 2000m for all in Z axis, add X, Y...
If not possible in Blender, can it be done in AE? It's over 700 frames so nothing I want to do manually :) .
I don't know exactly how much it will help you, but you might want to try looking into the addon AnimAide: https://github.com/aresdevo/animaide

In the graph editor it has the "Anim Transform" tool which "freezes time, so any transformation you do to an animated object or armature affects the entire animation equally".