I was able to add a zoom effect to the part I filmed with my camera. But when it zooms, the object I added via Greenscreen changes it position too. I also want to change its size cause when you zoom both objects become bigger.
You can use a conventional 2D track with the old legacy tracker to derive all the necessary info. I suggest you read up on this stuff on the online help. Anything more specific will require you to at least show us some reference frame/ screenshot.