Unity Editor & iOS - Download MP4 to Streaming Assets Folder

Im Trying to Correlate a video plugin called S-Plugin into my Virtual Reality App. Basically what S-Plugin does is allows us to load Movie Textures to iOS and Android. It works very well too, as long as it is pre-placed in the streaming assets. I tried to export an asset-bundle for iOS with a movie texture, and it won't work. Duhh iOS and Android are not compatible w/ MovieTextures.

So i Was reading some threads and they suggested importing the video file in directly. So I'm doing that. What I want to do is write the file to streaming assets. I do not think the file is even downloading. Can someone tell me if what I am doing is Correct?

Here is my code, if anyone can help, let me know.

 public string URL;
     public bool downloaded;
     public string videoTexturePath;
     private float wwwProgress;
     private MovieTexture downloadedMovie;
     private string filePath;
     private bool transfered;
     private SPluginsMovieTexture movieRenderer;
     private SPluginV2FUNN movieController;
     private SPluginToggleFUNN movieRemote;
 
     void Awake ()
     {
         movieRenderer = GetComponent <SPluginsMovieTexture>();
         movieController = GetComponent <SPluginV2FUNN>();
         movieRemote = GetComponent <SPluginToggleFUNN>();
         movieRemote.loadFromURL = true;
     }
 
     // Use this for initialization
     void Start () {
         StartCoroutine (Download());
     }
     
     // Update is called once per frame
     void Update () {
         videoTexturePath = movieRenderer.movieFileFullPathRelativeToTheStreamingAssets;
     if (downloaded == true)
         {
             if (transfered = false)
             {
                 transfered = true;
                 movieRenderer.movieFileFullPathRelativeToTheStreamingAssets = downloadedMovie.name;
                 movieRemote.loadFromURL = false;
                 if (movieController.AutoPlay == true)
                 {
                     movieController.Play();
                 }
             }
         }
     }
 
 public IEnumerator Download ()
     {
         using (WWW www = new WWW(URL)) {
             downloaded = false;
             
             print ("Downloading Video Now!");
             StartCoroutine (Progress());
             while (www.isDone != true)
             {
                 yield return new WaitForSeconds (0.05f);
                 wwwProgress = www.progress;
             }
             yield return www;
             print ("Downloaded Video !");
             downloaded = true;
             downloadedMovie = www.movie;
         }
 
     }
 
     IEnumerator Progress ()
     {
         if (downloaded == false)
         {
             //yield return new WaitForSeconds (0.075f);
             yield return new WaitForEndOfFrame();
             print ("Progress: " + wwwProgress + "/1");
             if (downloaded == false )
             {
                 StartCoroutine (Progress());
             }
         }
     }
 }