make 2d camera go down when player is falling

Unity Engine
1

So iam trying to move the camera down when player is falling so, the player is constantly in view of camera.
https://giant.gfycat.com/GiganticFeistyIlladopsis.webm

Iam trying to do it by chaning delta.y to positive by “delta.y = -delta.y” so, in theory if playing is falling and camera is behind trailing the player the delta.y vector is decresing going like -0.5 > -1 > -1.5 > -2 > …
So if I change this value to " delta = -delta " its should go like 0.5 > 1 > 1.5 > 2 > … but it doesnt work. Well it doesnt work as it is supposed to be working, insted going like 0.5 > 1 > 1.5 > 2 >… it doubles the noumbers but they are still negative(i want the numbers positive) -1 > -1.5 > -2.0 > -2.5 > …

using UnityEngine;
using System.Collections;
public class SmoothCamera2D : MonoBehaviour {
   
     public float dampTime = 0.15f;
     private Vector3 velocity = Vector3.zero;
     public Transform target;
     // Update is called once per frame
     void Update ()
     {
         if (target)
         {
             Vector3 point = camera.WorldToViewportPoint(target.position);
             Vector3 delta = target.position - camera.ViewportToWorldPoint(new Vector3(0.5f, 0.5f, point.z)); //(new Vector3(0.5, 0.5, point.z));

            

            if (target.GetComponent<playerCtonroller>().isJumping)
            {
                if(target.GetComponent<Rigidbody2D>().velocity.y <= 0)
                {
                 delta.y = -delta.y;
                }
                }
             Vector3 destination = transform.position + delta;
             transform.position = Vector3.SmoothDamp(transform.position, destination, ref velocity, dampTime);
         }
   
     }
}
2

Put your camera inside an empty gameobject and keep that objects position in line with the players.

transform.position = target.transform.position;

If you want it delayed you can use Vector3.MoveTowards to move towards the characters position by an amount & it wont overshoot.

3

I don’t quite understand the code, but it seems like you could just get an offset from the camera.position.y - target.position.y. Then just maintain that offset, so when he falls, the camera will fall also.