facebook video upload using prime31

I'm struggling to do a video upload using the prime31 social networking plugin. Mike at Prime31 said it's possible using www so I've been giving it a shot as you can see below. I also have placed in this document the facebook suggested php method to upload a video. I'm having trouble merging the two together and was wondering if anybody could look at my code and maybe explain where I've gone wrong. I am able to login and get a token with the prime31 plugin. I set the facebook app with permissions that should allow video uploading but am a little confused about that. The error I get when implementing my code after getting a token is 400 bad request.

My code so far

  private WWW w;
     public void FBPostVideo(){
     Debug.Log("in the fbpostvideo ienumerator");
     var moviebytes = System.IO.File.ReadAllBytes(Application.persistentDataPath+"/screenrecording.mp4");
     Debug.Log(moviebytes.Length);
     WWWForm form = new WWWForm();
     var video_desc="walkingthedog";
     var video_title="dogwalk";
     var access_token=token;
     form.AddBinaryData("file", moviebytes, "myvideo");
     var formurl="https://graph-video.facebook.com/me/videos?title="+video_title + "&description=" +video_desc + "&"+token;
     Debug.Log(formurl);
     WWW w = new WWW(formurl, form);
     StartCoroutine(waitForMovie(w));
     }
     
     public IEnumerator waitForMovie(WWW w){
         yield return w;
             if (!String.IsNullOrEmpty(w.error))
             Debug.Log(w.error);
         else
             Debug.Log("Finished Uploading");
     }

 *

 *The php suggested code:
     <?php 
     $app_id = "YOUR_APP_ID";
     $app_secret = "YOUR_APP_SECRET"; 
     $my_url = "YOUR_POST_LOGIN_URL"; 
     $video_title = "YOUR_VIDEO_TITLE";
     $video_desc = "YOUR_VIDEO_DESCRIPTION";
     
     $code = $_REQUEST["code"];
     
     if(empty($code)) {
        $dialog_url = "http://www.facebook.com/dialog/oauth?client_id=" 
          . $app_id . "&redirect_uri=" . urlencode($my_url) 
          . "&scope=publish_stream";
         echo("<script>top.location.href='" . $dialog_url . "'</script>");
     }
     
     $token_url = "https://graph.facebook.com/oauth/access_token?client_id="
         . $app_id . "&redirect_uri=" . urlencode($my_url) 
         . "&client_secret=" . $app_secret 
         . "&code=" . $code;
     $access_token = file_get_contents($token_url);
      
     $post_url = "https://graph-video.facebook.com/me/videos?"
         . "title=" . $video_title. "&description=" . $video_desc 
         . "&". $access_token;
     
     echo '<form enctype="multipart/form-data" action=" '.$post_url.' "  
          method="POST">';
     echo 'Please choose a file:';
     echo '<input name="file" type="file">';
     echo '<input type="submit" value="Upload" />';
     echo '</form>';
     ?>*