How to make an interactive movie (C#)

For a school project we are trying to make an interactive video. The character is supposed to have a video that loops (easy enough to make) but once a button is pressed it has to switch to another movie and afterwards back to the loop. I am working with MovieTextures but I can't load another Movietexture on the object to replace the loop, if anyone could help with that, I'd really appreciate it. Also if someone knows how to apply a random movietexture to the object, that would be SUPERB.

Here's my code:

using UnityEngine; using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

 public MovieTexture movie;
 public MovieTexture [] Like;
 public MovieTexture [] OLikes;
 public MovieTexture [] Dislike;
 public MovieTexture [] ODislike;

 void Start () {

     Renderer r = GetComponent<Renderer>();
     MovieTexture movie = (MovieTexture)r.material.mainTexture;
     movie.Play();
         movie.loop = true;
 
 
 }
 
 // Update is called once per frame
 void Update () {

     if (Input.GetKeyDown (KeyCode.L)) 
        {

                     movie.loop = false;
                     movie.Stop();

                     renderer.material.SetTexture ("_MainTex", Like[Random.Range(0, Like.Length)]);
                    // Tried getting the texture from the list, didn't work.

         
         
         movie = Like[Random.Range(0,Like.Length)];
                     // Another way I tried to get an item from the list
     
         movie.Play();
                 }
 
 }

}

The lists are filled in the inspector. I tried adding a second public MovieTexture just filled it in in the inspector but I couldn't get the texture to change.

ANY HELP, EVEN THE SIMPLEST CODE CAN GET ME A LITTLE FURTHER. IT'S ALL REALLY APPRECIATED.