How can I create vertical camera movement?,How can I make vertical camera movement?

I have recently begun following a tutorial to create a first person shooter. I have finished camera movement, w$$anonymous$$ch the tutorial says should also have verticality. I know t$$anonymous$$s is true because there is a way of manually setting a Y value to the script. I am completely stumped for what to do here.

Here is my script: using UnityEngine;

public class CameraMovement : MonoBehaviour { private GameObject player; private float minClamp = -90; private float maxClamp = 90; public Vector2 rotation; private Vector2 currentLookRot; private Vector2 rotationV = new Vector2(0, 0); public float lookSensitivity = 2; public float lookSmoothDamp = 0.1f;

 // Start is called before the first frame update
 void Start()
 {
   //Access the Player GameObject
   player = transform.parent.gameObject;
 }

 // Update is called once per frame
 void Update()
 {
    //Player input from the mouse
    rotation.y = Mathf.Clamp(rotation.y, minClamp, maxClamp);
    //Rotate the character around based on the mouse X position
    player.transform.RotateAround(transform.position, Vector3.up, Input.GetAxis("Mouse X") * lookSensitivity);
    //Smooth the current Y rotation for looking up and down.
    currentLookRot.y = Mathf.SmoothDamp(currentLookRot.y, rotation.y, ref rotationV.y, lookSmoothDamp);
    //Update the camera X rotation based on the values generated.
    transform.localEulerAngles = new Vector3(-currentLookRot.y, 0, 0);
 }

} ,I have been following a tutorial to crate a simple FPS, however I have run into some problems with camera control. The tutorial says that I should be able to move the camera vertically, and there is a method of manually typing in vertical rotation, but I cannot move it vertically in - game. Here is my script:

using UnityEngine;

public class CameraMovement : MonoBehaviour { private GameObject player; private float minClamp = -90; private float maxClamp = 90; public Vector2 rotation; private Vector2 currentLookRot; private Vector2 rotationV = new Vector2(0, 0); public float lookSensitivity = 2; public float lookSmoothDamp = 0.1f;

 // Start is called before the first frame update
 void Start()
 {
   //Access the Player GameObject
   player = transform.parent.gameObject;
 }

 // Update is called once per frame
 void Update()
 {
    //Player input from the mouse
    rotation.y = Mathf.Clamp(rotation.y, minClamp, maxClamp);
    //Rotate the character around based on the mouse X position
    player.transform.RotateAround(transform.position, Vector3.up, Input.GetAxis("Mouse X") * lookSensitivity);
    //Smooth the current Y rotation for looking up and down.
    currentLookRot.y = Mathf.SmoothDamp(currentLookRot.y, rotation.y, ref rotationV.y, lookSmoothDamp);
    //Update the camera X rotation based on the values generated.
    transform.localEulerAngles = new Vector3(-currentLookRot.y, 0, 0);
 }

}