<div class="videoplayer">
<iframe id="ytplayer" type="text/html" width="840" height="473" src="<?php
$ytlink = get_post_meta($post->ID, 'Video', true);
$ytlink = str_replace('https://www.youtube.com/watch?v=', 'https://www.youtube.com/embed/', $ytlink);
echo $ytlink;
?>?modestbranding=0&showinfo=0" frameborder="0" allowfullscreen></iframe>
</div>