Metatags generated from views results
Found this thread, which was very helpful:

Metatags and Commerce - pass taxonomy metatags to commerce product view

I adapted that approach to have metatag generate the tags from the first entity returned by the view:

/* 
 * Implement HOOK_views_post_render to run code for each view render
 */ 
function THEME_OR_MODULE_views_post_render(&amp;$view, &amp;$output, &amp;$cache) {
  // check for a particular view and view display page
  if ($view-&gt;name=='YOUR_VIEW' &amp;&amp; $view-&gt;current_display == 'YOUR_VIEW_DISPLAY') {

    // retrieve the first node in the view
    $entity_type = 'node';
    $entity = entity_load($entity_type, $view-&gt;result[0]-&gt;nid);
    $language = entity_language($entity_type,$entity);

    // Generate metatags output
    if ($tags = metatag_generate_entity_metatags($entity, $entity_type, $language, 'YOUR_ENTITY_DISPLAY_MODE')) {
      list($entity_id, $revision_id, $bundle) = entity_extract_ids($entity_type, $entity);
      $instance = "{$entity_type}:{$bundle}";

      // register the term's metatags
      metatag_page_set_metatags($instance, $tags);
    }
  }
}


Here is alternate code which doesn't rely on the Metatag module, and allows for more finely tailored meta tags based on view results:

function HOOK_preprocess_html(&amp;$vars) {

    // only operate on the front page
    if ($vars['is_front']) {

        // get the view results
        $view_results = views_get_view_result('YOUR_VIEW_NAME','YOUR_VIEW_DISPLAY_NAME');
        // load up the first node
        $node = entity_metadata_wrapper('node',$view_results[0]-&gt;_field_data['nid']['entity']);

        // get some data
        $title = $node-&gt;label();

        // some fields may require more processing
        $description = trim(drupal_html_to_text($node-&gt;field_description-&gt;value()['safe_value']));
        $image = image_style_url('YOUR_IMAGE_STYLE',$film-&gt;field_image-&gt;value()['uri']);

        // generate and output the meta tags
        $tag = array(
        '#type' =&gt; 'html_tag',
        '#tag' =&gt; 'meta',
        '#attributes' =&gt; array(
          'property' =&gt;  'og:title',
          'content' =&gt; $title,
        )
        );
      drupal_add_html_head($tag, 'og_title');

        $tag = array(
        '#type' =&gt; 'html_tag',
        '#tag' =&gt; 'meta',
        '#attributes' =&gt; array(
          'property' =&gt;  'og:description',
          'content' =&gt; $description,
        )
        );
      drupal_add_html_head($tag, 'og_description');

        $tag = array(
        '#type' =&gt; 'html_tag',
        '#tag' =&gt; 'meta',
        '#attributes' =&gt; array(
          'property' =&gt;  'og:image',
          'content' =&gt; $image,
        )
        );
      drupal_add_html_head($tag, 'og_image');
    }
}