title: stream/download private videos on Vimeo in iOS application without authenticating
body: <p>I'd like to know if there's any solution to the following scenario:</p>
  
  <ul>
  <li>there's an account with private videos, all marked as 'hidden from Vimeo.com', but enabled for embedding on several domains</li>
  <li>there's an iOS application that is supposed to have access to all those videos (stream/download)</li>
  </ul>
  
  <p>OAuth2 allows us to grant permissions to application acting on user's behalf.</p>
  
  <p>However, in this particular case, we have a different scenario: we need to restrict access to videos to <em>either</em> allowed websites (via embedding) or to iOS application, and the latter case should work without any authentication interactions.</p>
  
  <p>Is there any way to solve this without generating &amp; embedding an access token (which is far from being secure, let alone the fact that access token is supposed to expire at some point)?</p>
  
  <p>Thanks.</p>