title: Cobalt preload API support
body: <p>With Cobalt RC_9 I tried the following </p>
  
  <pre><code>cobalt --url=https://www.youtube.com/tv?launch=preload&amp;additionalDataUrl=http%3A%2F%2Flocalhost%3A8080%2FdialData%2FYouTube
  </code></pre>
  
  <p>but the application does not seem to load in background.</p>
  
  <p>Does Cobalt support YouTube TV preload API yet?</p>
  
  <p>How is the preload API actually supposed to work?</p>