using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public float speed = 10.0f;
    public float gravity = -9.81f;
    public float jumpHeight = 3.0f;
    public float mouseSensitivity = 100.0f;
    public Transform playerBody;

    private CharacterController controller;
    private Vector3 velocity;
    private float xRotation = 0f;

    void Start()
    {
        controller = GetComponent<CharacterController>();
        Cursor.lockState = CursorLockMode.Locked;
    }

    void Update()
    {
        float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
        float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;

        xRotation -= mouseY;
        xRotation = Mathf.Clamp(xRotation, -90f, 90f);

        Debug.Log("Mouse X: " + mouseX);
        Debug.Log("Mouse Y: " + mouseY);
        Debug.Log("Local Rotation Before: " + transform.localRotation);
        transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);
        Debug.Log("Local Rotation After: " + transform.localRotation);
        playerBody.Rotate(Vector3.up * mouseX);

        if (controller.isGrounded && velocity.y <= 0)
        {
            velocity.y = -2f;
        }

        float x = Input.GetAxis("Horizontal");
        float z = Input.GetAxis("Vertical");

        Vector3 move = transform.right * x + transform.forward * z;

        controller.Move(move * speed * Time.deltaTime);

        if (Input.GetButtonDown("Jump") && controller.isGrounded)
        {
            velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
        }

        velocity.y += gravity * Time.deltaTime;

        controller.Move(velocity * Time.deltaTime);

        Debug.Log("Mouse X: " + mouseX);
        Debug.Log("Mouse Y: " + mouseY);
        Debug.Log("Local Rotation: " + transform.localRotation);

    }
}

Video: https://youtu.be/c2iGfd8AqH0
When I rotate the camera on the Y axis, I see that it rotates and instantly returns to the zero point.

I tried to rewrite the camera movement but now it only rotates along the Y axis. What should I do?
I asked my friends but they themselves don’t know.