Tilt camera left or right on keyboard input,Tilt camera when player moves left or right

I want to make something like this https://youtu.be/wjjWRvISq_U , but don't know how. My playermovement script:

 using UnityEngine;
 
 public class PlayerMovement : MonoBehaviour
 {
     public CharacterController controller;
 
     public static float NORMAL_SPEED = 12f;
     public static float FAST_SPEED = 20f;
 
     public float speed = NORMAL_SPEED;
     public float gravity = -9.81f;
     public float jumpHeight = 3f;
     public Transform groundCheck;
     public float groundDistance = 0.4f;
     public LayerMask groundMask;
 
     public Vector3 velocity;
     bool isGrounded;
 
     void Update()
     {
         isGrounded = Physics.CheckSphere(groundCheck.position, groundDistance, groundMask);
         if (isGrounded && velocity.y < 0)
         {
             velocity.y = -2f;   
         }
 
         float x = Input.GetAxis("Horizontal");
         float z = Input.GetAxis("Vertical");
 
         if(Input.GetKeyDown(KeyCode.LeftShift))
         {
             speed = FAST_SPEED;
         }
 
         if (Input.GetKeyUp(KeyCode.LeftShift))
         {
             speed = NORMAL_SPEED;
         }
 
         Vector3 move = transform.right * x + transform.forward * z;
 
         controller.Move(move * speed * Time.deltaTime);
 
         if(Input.GetButtonDown("Jump") && isGrounded)
         {
             velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
         }
         
         velocity.y += gravity * Time.deltaTime;
 
         controller.Move(velocity * Time.deltaTime);
     }
 }