tax_query

$tax_query = array(
	'relation' => 'OR',
	array(
		'taxonomy'         => 'video_cat',
		'terms'            => array( '1', '2', '3' ),
		'field'            => 'term_id',
		'operator'         => 'IN',
		'include_children' => true,
	),
	array(
		'taxonomy'         => 'post_tag',
		'terms'            => array( '1', '2', '3' ),
		'field'            => 'term_id',
		'operator'         => 'IN',
		'include_children' => false,
	),
);