$tax_query – videos

$tax_query = array(
	array(
		'taxonomy'         => 'category',
		'terms'            => '199',
		'field'            => 'term_id',
	),
	array(
		'taxonomy'         => 'post_format',
		'terms'            => 'post-format-video',
		'field'            => 'slug',
	),
);