Tax Post Format Video
$tax_video = array( 'relation' => 'OR', array( 'taxonomy' => 'post_format', 'terms' => 'post-format-video', 'field' => 'slug', 'operator' => 'IN', ), );
$tax_video = array( 'relation' => 'OR', array( 'taxonomy' => 'post_format', 'terms' => 'post-format-video', 'field' => 'slug', 'operator' => 'IN', ), );