title: Keeping a scrubber on one device in sync with a video playing on another
body: <p>I have two iOS devices, and both have a copy of the same video. Both devices are communicating over bluetooth. The video is only playing on one device while the other is the remote control. The "remote control" device needs a scrubber showing where in the duration the video is.</p>
  
  <p>What is the best way to keep the scrubber in sync with the video playing?</p>
  
  <p>I'm using AVPlayer for playing the video and Gamekit for the bluetooth connection.</p>