Video query transient. The HOUR_IN_SECONDS constant is available in 3.5+, otherwise you can just use something like 60*60

video-query-transient.php

<?php

$query = get_transient( 'video_query' );

if ( false == $query ) {
	$query = new WP_Query( $args );
	set_transient( 'video_query', $query, HOUR_IN_SECONDS );
}

if ( $query->have_posts() ) : while ( $query->have_posts() ) : $query->the_post();

...

endwhile; endif;