title: Merge videos in iOS
body: <p>I'm using this wonderful tutorial to load 2 videos and merge them in iOS.  </p>
  
  <p><a href="http://www.raywenderlich.com/13418/how-to-play-record-edit-videos-in-ios" rel="nofollow">http://www.raywenderlich.com/13418/how-to-play-record-edit-videos-in-ios</a></p>
  
  <p>I'd like to adapt this to be able to handle unlimited videos selected by the user, but am struggling.  How do I create an array of AVAsset objects that can then be combined into a single video?</p>