Handheld.PlayFullScreenMovie dont work, help

im create folder StreamingAssets and put my movie there. and this script

 using UnityEngine;
 using System.Collections;
  
 public class IntroMovie : MonoBehaviour {
  
 void Start() {
 StartCoroutine(CoroutinePlayMovie());
 }
  
 protected IEnumerator CoroutinePlayMovie() {
 Handheld.PlayFullScreenMovie ("finalandroid.mp4", Color.black, FullScreenMovieControlMode.CancelOnInput);
 yield return new WaitForSeconds(1.0f);
 Application.LoadLevel("mainMenu");
 }
 }

but my movie dont play ): what could it be?

ps.: the movie was exported using adobe premier as an h.264 format, 640x480 29.9 fps movie file. (i used a preset for android tablets phone devices 480p)

I looked if the video was playing on android, it seems that it appears but it goes very fast. My Video has 6 seconds duration