My Camera lookAt script doesn't work

Hi, i'm totally new to Unity so please dont blame me for anything :)

I'm trying to make a camera that follows a ball(the player). But somehow it doesnt look at the ball, but follows it, like if it was over the ball.

Video that shows my problem

Here is my script:

 using UnityEngine;
 using System.Collections;
 
 public class CameraMotor : MonoBehaviour 
 {
     public Transform lookAt;
 
     private Vector3 offset;
 
     private float distance = 5.0f;
     private float yOffset = 3.5f;
 
     private void Start()
     {
         offset = new Vector3 (0, yOffset, -1f * distance);
     }
 
     private void Update()
     {
         transform.position = lookAt.position + offset;
     }
 }

All help is appreciated:)