title: Subdomain redirect to a full URL and keeping original subdomain
body: <p>So, to be more graphic at the beginning:</p>
  
  <p>This is current link structure:</p>
  
  <p><code>http://example.com/video-slug/wordpress-title-of-the-video-slug</code></p>
  
  <p>I have a subdomain:</p>
  
  <p><code>http://tv.example.com/</code></p>
  
  <p>What I want to achieve is, when someone clicks on:</p>
  
  <p><code>http://tv.example.com/wordpress-title-of-the-video-slug</code></p>
  
  <p>It figures out that <code>tv.example.com</code> equals <code>example.com/video</code> and opens the the link:</p>
  
  <p><code>http://example.com/video/wordpress-title-of-the-video-slug</code>, but keeps the structure in location bar:</p>
  
  <p><code>http://tv.example.com/wordpress-title-of-the-video-slug</code></p>