Use UI to play video in Unity

using UnityEngine;
using UnityEngine.Video;
using UnityEngine.UI;
public class PlayVideoOnUGUI : MonoBehaviour
{
    private Texture texture;
    //定义参数获取VideoPlayer组件和RawImage组件
    private VideoPlayer videoPlayer;
    private RawImage rawImage;
   
    private void Awake()
    {
        rawImage = this.GetComponent<RawImage>();
        texture = rawImage.texture;
        videoPlayer = this.GetComponent<VideoPlayer>();
    }

    private void OnDisable()
    {
        rawImage.texture = texture;
    }
  
    private void Update()
    {
        //如果videoPlayer没有对应的视频texture，则返回
        if (videoPlayer.texture == null)
        {
            return;
        }
        //把VideoPlayerd的视频渲染到UGUI的RawImage
        rawImage.texture = videoPlayer.texture;
    }
}