Tax query media category
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'media_category', 'terms' => '14', 'field' => 'term_id', ), );
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'media_category', 'terms' => '14', 'field' => 'term_id', ), );