No error but code not working c#

Unity Engine
1

Hi I have recently come across a problem i have written code for a player to move and to look around but my camera is suppose to look up and down but it doesnt i have attached the camera to the script and it doesnt work here is the code

using UnityEngine;

[RequireComponent(typeof(PlayerMotor))]
public class PlayerController : MonoBehaviour {
    [SerializeField]
    private float speed = 5f;
    [SerializeField]
    private float lookSensitivity = 3f;


    private PlayerMotor motor;

    void Start()
    {
        motor = GetComponent<PlayerMotor>();
    }

    void Update ()
    {
        //calculate movement velocity as 3d vector
        float _xMov = Input.GetAxisRaw ("Horizontal");
        float _zMov = Input.GetAxisRaw ("Vertical");
       
        Vector3 _movHorizontal = transform.right * _xMov;
        Vector3 _movVertical = transform.forward * _zMov;

        Vector3 _velocity = (_movHorizontal + _movVertical).normalized * speed;


        motor.Move(_velocity);

        //calculatrerotain3dvector this applys ti turniung 
        float _yRot = Input.GetAxisRaw("Mouse X");
        Vector3 _rotation = new Vector3(0f, _yRot, 0f) * lookSensitivity;

        motor.Rotate(_rotation);

        //calculatrerotain3dvector this applys ti turniung 
        float _xRot = Input.GetAxisRaw("Mouse Y");
        Vector3 _cameraRotation = new Vector3 (0f, _xRot, 0f) * lookSensitivity;
       
        motor.RotateCamera(_cameraRotation);
    }
}

using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class PlayerMotor : MonoBehaviour {

    [SerializeField]
    private Camera cam;

    private Vector3 velocity = Vector3.zero;
    private Vector3 rotation = Vector3.zero;
    private Vector3 cameraRotation = Vector3.zero;



    private Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }
   
    public void Move (Vector3 _velocity)
    {
        velocity = _velocity;
    }

    public void Rotate(Vector3 _rotation)
    {
        rotation = _rotation;
    }

    public void RotateCamera(Vector3 _cameraRotation)
    {
        cameraRotation = _cameraRotation;
    }
   

    void FixedUpdate ()
    {
        PerformMovement();
        PerformRotation();
    }
    //preform movement
    void PerformMovement()
    {
        if (velocity != Vector3.zero)
        {
            rb.MovePosition(rb.position + velocity * Time.fixedDeltaTime);
        }
    }

    void PerformRotation()
    {
        rb.MoveRotation(rb.rotation * Quaternion.Euler (rotation));
        if (cam != null)
        {
            cam.transform.Rotate (-cameraRotation);

        }
    }
}
2

problem 1)
Your camera, is not parented to your game object:

cam.transform.parent = transform;

problem 2)
It is unclear if this is a first person camera or a third person camera, I will assume that it is a first person.
Your Camera moves on the Y direction and needs to work on the X direction

Vector3 _cameraRotation = new Vector3(_xRot, 0f, 0f) * lookSensitivity;

problem 3)
Your code doesn’t and probably may not require that you have locked the x and z rotations.

rb.constraints = RigidbodyConstraints.FreezeRotationX | RigidbodyConstraints.FreezeRotationZ;

using UnityEngine;

[RequireComponent(typeof(PlayerMotor))]
public class PlayerController : MonoBehaviour
{
    [SerializeField]
    private float speed = 5f;
    [SerializeField]
    private float lookSensitivity = 3f;


    private PlayerMotor motor;

    void Start()
    {
        motor = GetComponent<PlayerMotor>();
    }

    void Update()
    {
        //calculate movement velocity as 3d vector
        float _xMov = Input.GetAxisRaw("Horizontal");
        float _zMov = Input.GetAxisRaw("Vertical");

        Vector3 _movHorizontal = transform.right * _xMov;
        Vector3 _movVertical = transform.forward * _zMov;

        Vector3 _velocity = (_movHorizontal + _movVertical).normalized * speed;


        motor.Move(_velocity);

        //calculatrerotain3dvector this applys ti turniung
        float _yRot = Input.GetAxisRaw("Mouse X");
        Vector3 _rotation = new Vector3(0f, _yRot, 0f) * lookSensitivity;

        motor.Rotate(_rotation);

        //calculatrerotain3dvector this applys ti turniung
        float _xRot = Input.GetAxisRaw("Mouse Y");
        Vector3 _cameraRotation = new Vector3(_xRot, 0f, 0f) * lookSensitivity;

        motor.RotateCamera(_cameraRotation);
    }
}

using UnityEngine;

[RequireComponent(typeof(Rigidbody))]
public class PlayerMotor : MonoBehaviour
{

    [SerializeField]
    private Camera cam;

    private Vector3 velocity = Vector3.zero;
    private Vector3 rotation = Vector3.zero;
    private Vector3 cameraRotation = Vector3.zero;



    private Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
        cam.transform.parent = transform;
        rb.constraints = RigidbodyConstraints.FreezeRotationX | RigidbodyConstraints.FreezeRotationZ;
    }

    public void Move(Vector3 _velocity)
    {
        velocity = _velocity;
    }

    public void Rotate(Vector3 _rotation)
    {
        rotation = _rotation;
    }

    public void RotateCamera(Vector3 _cameraRotation)
    {
        cameraRotation = _cameraRotation;
    }


    void FixedUpdate()
    {
        PerformMovement();
        PerformRotation();
    }
    //preform movement
    void PerformMovement()
    {
        if (velocity != Vector3.zero)
        {
            rb.MovePosition(rb.position + velocity * Time.fixedDeltaTime);
        }
    }

    void PerformRotation()
    {
        rb.MoveRotation(rb.rotation * Quaternion.Euler(rotation));
        if (cam != null)
        {
            cam.transform.Rotate(-cameraRotation);

        }
    }
}
3

Wow thank you are amazing it works now and i really appreciate what you have done thanks