title: smarty if empty else smarty value
body: <p>I have smarty value if it empty need another result</p>
  
  <pre><code>{get_video_meta video_id=$video_data.id key='test'}
  </code></pre>
  
  <p>This value print "test" If this value is empty else how can I use?</p>
  
  <pre><code> {if !empty({get_video_meta video_id=$video_data.id key='test'})} 
    No value
   {else}
   {get_video_meta video_id=$video_data.id key='test'}
  {/if}
  </code></pre>
  
  <p>This code not work</p>