loop.php

for ($i = 1; $i < 5; $i++) { 
								
	$content = get_post_meta($post->ID, 'video_card'.$i, true);
        $max = // Number of videos that were returned.
							
	echo '<li>';

	if ($content) {
										
		echo $content;
		echo '<p> ' . $i . ' of ' . $max . ' Video(s)</p>';
										
	} else {
										
		echo '<p>There are no more videos in this series</p>';
										
	}
									
echo '</li>';