title: What is difference between URLWithString and fileURLWithPath of NSURL?
body: <p>In my code I have to use <code>URLWithString</code> to play streaming(<code>HLS</code>) video and <code>fileURLWithPath</code> to play local video. </p>
  
  <p>What is the difference between these two methods?
  How should I use single method to play both videos.</p>
  
  <p>Also I need to show last frame as still image when <code>HSL</code> video ends. Its now showing blank screen when it ends. How should i achieve this?</p>