camera zoom in After effects.
Camera pan and zoom with Null object: After Effects Tutorial
In this tutorial I show you how to pan and zoom with the Camera object controlled by a Null object in After Effects.
A very basic Adobe After Effects tutorial showing you how to do an effect where two images are placed side by side or two videos are played side by side, then the camera zooms into one of them.

To create a Camera in After Effects, navigate to the top menu bar and click Layer -- New -- Camera. This will show a dialog box in which you can customize Camera options.