php mysql fetch two table

i have two table from mysql.

1, photo (url_link)

2, video(url_link)

i wanna fetch only 1 table (video url) if both table aren't empty.. Is there anyways? am using code below:

<--photo -->
    <?php       
$query_img = mysql_query("SELECT `url` FROM `photos_news` WHERE title='{$thumn_content['titles']}' LIMIT 0,1");
while($img = mysql_fetch_array($query_img)){ ?>
<img src="<?php echo $img['url'];?>" class="img-responsive img-rounded"/>
<?php }?>


<!-- vdo -->
<?php
$query_vdo = mysql_query("SELECT `url` FROM `video_news` WHERE title='{$thumn_content['titles']}' LIMIT 0,1");
while($vdo = mysql_fetch_array($query_vdo)){ ?>
<div class="embed-responsive embed-responsive-16by9">
  <iframe class="embed-responsive-item" src="<?php echo $vdo['url']?>?modestbranding=1&showinfo=0&fs=0"></iframe>
</div>

<?php }?>

thank you sir,