1打开unity,新建一个场景，创建 GameObject-----UI-----RawImage.并且创建三个按钮分别为暂停与播放按钮，上一个，下一个，两个切换按钮。调整好合适的大小和位置。

2.下载好两个以上需要切换的视频，注意修改格式为MP4格式。接下来就导入视频资源。打开unity -----直接将视频拖入Assets界面。

3.编写脚本对视频的播放进行控制。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Video;

public class Video_Controller : MonoBehaviour {
    private VideoPlayer videoplayer;
    private RawImage rawImage;
    private int currentClipIndex;

    public Text text_playorpause;
    public Button button_playorpause;
    public Button button_pre;
    public Button button_next;
    public VideoClip[] videoClips;//定义了一个数组
	// Use this for initialization
	void Start () {
        videoplayer = this.GetComponent<VideoPlayer>();//获取组件
        rawImage = this.GetComponent<RawImage>();
        currentClipIndex = 0;
        button_playorpause.onClick.AddListener(OnplayorpauseVideo);
        button_pre.onClick.AddListener(OnpreVideo);
        button_next.onClick.AddListener(OnnextVideo);//调用方法
	}
	
	// Update is called once per frame
	void Update () {
        if (videoplayer.texture == null)
        {
            return;
        }
            rawImage.texture = videoplayer.texture;
        
        
		
	}
    private void OnplayorpauseVideo() {
        if (videoplayer.enabled == true)
       {
            if (videoplayer.isPlaying) { 
                videoplayer.Pause();
            text_playorpause.text = "播放";
            Debug.Log("2322");//用于调试脚本不能正常运行

           }
          else if (!videoplayer.isPlaying)
          {
            videoplayer.Play();
            Debug.Log("111");
            text_playorpause.text = "暂停";
          }
        }
    }
    private void OnpreVideo() {
        currentClipIndex -= 1;
        if (currentClipIndex < 0) {
            currentClipIndex = videoClips.Length - 1;
        }
        videoplayer.clip = videoClips[currentClipIndex];
        text_playorpause.text = "暂停";
        }
    private void OnnextVideo()
    {
        currentClipIndex += 1;
        currentClipIndex = currentClipIndex % videoClips.Length;
        videoplayer.clip = videoClips[currentClipIndex];
        text_playorpause.text = "暂停";
    }
    }
    

4.把脚本挂在RawImage上。并给脚本赋予相应的按钮。

 最后点击运行就可以实现视频的播放暂停，和切换。

5.思路方法总结：

    多个视频播放，要判断视频的播放状态，转化按钮的功能。要实现视频播放和暂停videoplayer.play();和video.pause();的方法；就需要运用到videoplayer.enabled(bool)，videoplayer.isplaying或！videoplayer.is playing等的布尔类型来进行判断。

创建一个数组来存储视频。public VideoClip[] video Clips.自定义了暂停与播放，上一个，下一个三个方法。