<?php
$vids=get_post_meta($post->ID,"vids",true)!="" ? get_post_meta($post->ID,"vids",true) : null;
$thumb="http://i1.ytimg.com/vi/".$vids."/mqdefault.jpg";
?>
<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><img src="<?php echo $thumb;?>" alt="<?php the_title(); ?>" width="130px" height="97px" /></a>