unity - Set the start orientation of the gyroscope to initial phone orientation

I am making a mobile VR project in Unity, and I have a 360-degree video that starts playing where I can look around using a VR headset.

I am trying to set the start rotation of the video to the same rotation as my phone. So no matter where I look when I start the video, that should be my start rotation. I used Input.gyro.attitude in the start but that did not fix my problem. I think I am using it wrong.

This is my code (on the camera inside the sphere):

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

using UnityEngine.UI;

public class Gyroscope : MonoBehaviour
{
    private bool gyroEnabled;
    private Gyroscope gyro;
    private GameObject cameraContainer; //A camera container for my main camera
    private GameObject videoSphere; //The sphere my video is in
    private Quaternion rot;


    private void Start()
    {
        videoSphere = GameObject.FindGameObjectWithTag("Video");
        cameraContainer = new GameObject("Camera Container");

        gyroEnabled = EnableGyro();

        cameraContainer.transform.position = transform.position; // put the cameracontainer into the sphere
        cameraContainer.transform.rotation = Input.gyro.attitude; // here I want to set the cameracontainer to the rotation of my phones gyroscope 
        transform.SetParent(cameraContainer.transform); // make my main camera a child of the camera Container


        videoSphere.transform.localRotation = cameraContainer.transform.rotation; // Here I wanted to set my sphere rotation to the camera rotation
        Debug.Log(videoSphere.transform.localRotation);
    }

    private bool EnableGyro()
    {
        if (SystemInfo.supportsGyroscope)
        {
            Input.gyro.enabled = true; // turn on my gyroscope


            cameraContainer.transform.rotation = new Quaternion(0, 90, -90, 0); // rotate my camera container so the video shows good
            rot = new Quaternion(0, 0, 1, 0); // set the variable rot so that you can turn your device
            return true;
        }
        return false;
    }

    private void Update()
    {

        if (gyroEnabled)
        {
            transform.localRotation = Input.gyro.attitude * rot; //this makes you turn the device and it recognizes the input of the phones gyroscope        
        }
    }
}