MovieTexture not playing in playmode

I can't seem to load in a movietexture from file, attach it as a movietexture to a prefab instance (created via script upon opening of Unity), and play it in edit mode. I can do two things: 1) I can get the texture to play in edit mode. The movie I'm importing is already in ogv format. So I simply am able to attach it to the prefab and play the texture, triggered by my script. However, this is all done in edit mode, not play mode 2) I can import the texture as an mp4 movie texture and assign it as a texture to my prefab. In this case, I can not get it to play in edit mode and when I enter play mode, I get the following error

LoadMoveData got NULL! UnityEngine.MovieTexture:Play()

However, my movie is already imported into the project as an asset so it should not be null.

Can anyone assess the issue?? My code is as follows:

using UnityEditor; using UnityEngine; using System.Collections;

[ExecuteInEditMode] class MyEditorScript : MonoBehaviour {

 static void Start()
 {

     if (Application.isPlaying)
         return;
     Debug.Log ("Test");
     Vector3 position = new Vector3(0, 0, 0);
     Vector3 scale = new Vector3 (10, 10, 10);
     GameObject newSphere = (GameObject)Instantiate (Resources.Load("360 Video Player"));
     newSphere.name = "360 Video Player";
     newSphere.transform.position = position;
     newSphere.transform.localScale = scale;
     WWW diskTex = new WWW ("file:///C:\\...\\Video.ogv");
     MovieTexture tex1 = diskTex.movie;
     while (!tex1.isReadyToPlay) {

     }
     MovieBehaviorScript mov = newSphere.GetComponent<MovieBehaviorScript> ();
     mov.movTexture = tex1;
     Renderer ren = newSphere.GetComponent<Renderer>();
     ren.sharedMaterial.mainTexture = tex1;
     UnityEditor.EditorApplication.ExecuteMenuItem("Edit/Play");
     tex1.Play ();
 }

}