Okay I got it! And this code works perfectly for me. 🙂
<?php $args=array(
'post_type' => 'post',
'posts_per_page' => 4,
'paged' => $paged,
'tax_query' => array(
array(
'taxonomy' => 'post_format',
'field' => 'slug',
'terms' => array('post-format-video'),
'operator' => 'IN')
)
);
$my_query = null;
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
$i = 0;
while ($my_query->have_posts()) : $my_query->the_post();
// modified to work with 3 columns
// output an open <div>
if($i % 4 == 0) { ?>
<div class="row">
<?php
}
?>
<?php get_template_part( 'template/loop', 'video' ); ?>
<?php $i++;
if($i != 0 && $i % 4 == 0) { ?>
</div><!--/.row-->
<div class="clearfix"></div>
<?php
} ?>
<?php endwhile; } wp_reset_query();?>