title: Youtube API get video file or sound
body: <p>I'm using the YouTube API in my android app,and everything works good.
  Right now I have a search engine which search videos in youtube,I want to get the sound of the video when I choose a video from the search list.
  I used this code to search in youtube:</p>
  
  <pre><code>ntent intent;
      intent = YouTubeIntents.createSearchIntent(getActivity().getApplicationContext(), "Zach");
      startActivity(intent);
  </code></pre>
  
  <p>It's from their sample,I need this for myself use.
  I also there is a way to use link with their DATA API like this:</p>
  
  <pre><code>https://www.googleapis.com/youtube/v3/videos?id=&lt;video_id&gt;&amp;key=&lt;YOUR_API_KEY&gt;&amp;part=snippet
  </code></pre>
  
  <p>But it works with video id not a search list or something.</p>