title: How to use Google Cast Apps by intent?
body: <p>I know that Android Youtube App and Chrome App are both support Google Cast. They have a Cast Button, if user click it, these apps will push their screen and sound to Chromecast.</p>
  
  <p>I want to implement an App, which can open Youtube App and Chrome App and show them on Chromecast via Intent without click any Cast Button, is it possible? How can I to?</p>