How to go to next scene after the movie played and or if a key was pressed

I successfully played my movie, but now i want to go to the next scene after it played or the skip option by a button how can i implement it on a this script? thanks

 using UnityEngine;
 using System.Collections;
 
 [RequireComponent (typeof (GUITexture))]
 [RequireComponent (typeof (AudioSource))]
 
 public class PlayVideo : MonoBehaviour 
 {
     //the GUI texture
     private GUITexture videoGUItex;
     //the Movie texture
     private MovieTexture mTex;
     //the AudioSource
     private AudioSource movieAS;
     //the movie name inside the resources folder
     public string movieName;
     
     void Awake()
     {
         //get the attached GUITexture
         videoGUItex = this.GetComponent<GUITexture>();
         //get the attached AudioSource
         movieAS = this.GetComponent<AudioSource>();
         //load the movie texture from the resources folder
         mTex = (MovieTexture)Resources.Load(movieName);
         //set the AudioSource clip to be the same as the movie texture audio clip
         movieAS.clip = mTex.audioClip;
         //anamorphic fullscreen
         videoGUItex.pixelInset = new Rect(Screen.width/2, -Screen.height/2,0,0);
     }
 
     //On Script Start
     void Start()
     {
         //set the videoGUItex.texture to be the same as mTex
         videoGUItex.texture = mTex;
         //Plays the movie
         mTex.Play();
         //plays the audio from the movie
         movieAS.Play(); 
     }
     IEnumerator waitForMovieEnd()
     {
         
         while(mTex.isPlaying) // while the movie is playing
         {
             yield return new WaitForEndOfFrame();
         }
         // after movie is not playing / has stopped.
         onMovieEnded();
     }
     
     void onMovieEnded()
     {
         Debug.Log("Movie Ended!");
         Application.LoadLevel("MainScene");
     }
 }