title: Is there a way to share video with SLComposeViewController fb and twitter
body: <p>I need to allow users to share video and images to fb and twitter. I recently found the SLComposeViewController but it seems there is only an addImage method and no addVideo method. I'd really like to use the SLComposeViewController to share video because I'm on a tough time constraint. This is what I have so far and it works but there is no addVideo method:</p>
  
  <pre><code>var shareToTwitter : SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeTwitter)
      shareToTwitter.setInitialText("initial text")
      //shareToTwitter.addImage(UIImage(named: "32.png"))
  
      self.presentViewController(shareToTwitter, animated: true, completion: nil)
  </code></pre>
  
  <p>I'd really like to have the same sharing feature like instagram does. Is this possible with the SLComposeViewController? </p>