diff --git a/includes/themes/media_youtube.theme.inc b/includes/themes/media_youtube.theme.inc
index 84c97cf..8b0fc79 100644
--- a/includes/themes/media_youtube.theme.inc
+++ b/includes/themes/media_youtube.theme.inc
@@ -30,11 +30,11 @@ function media_youtube_preprocess_media_youtube_video(&$variables) {
 
   // These queries default to 0. If the option is true, set value to 1.
   foreach (array('autoplay', 'enablejsapi', 'loop', 'modestbranding') as $option) {
-    if ($variables['options'][$option]) {
+    if (!empty($variables['options'][$option])) {
       $query[$option] = 1;
     }
   }
-  if ($variables['options']['enablejsapi']) {
+  if (!empty($variables['options']['enablejsapi'])) {
     // Add a query ID and identical html ID if js API is set.
     $query['playerapiid'] = drupal_html_id('media-youtube-' . $variables['video_id']);
     $variables['api_id_attribute'] = 'id="' . $query['playerapiid'] . '" ';
@@ -49,13 +49,13 @@ function media_youtube_preprocess_media_youtube_video(&$variables) {
   // Currently, loop only works with a playlist. Make fake playlist out of a
   // single video.
   // @see https://developers.google.com/youtube/player_parameters#loop
-  if ($variables['options']['loop']) {
+  if (!empty($variables['options']['loop'])) {
     $query['playlist'] = $variables['video_id'];
   }
 
   // These queries default to 1. If the option is false, set value to 0.
   foreach (array('rel', 'showinfo') as $option) {
-    if (!$variables['options'][$option]) {
+    if (empty($variables['options'][$option])) {
       $query[$option] = 0;
     }
   }
@@ -65,25 +65,25 @@ function media_youtube_preprocess_media_youtube_video(&$variables) {
   // (None right now.)
 
   // Strings.
-  if ($variables['options']['theme'] != 'dark') {
+  if (!empty($variables['options']['theme']) && $variables['options']['theme'] != 'dark') {
     $query['theme'] = $variables['options']['theme'];
   }
-  if ($variables['options']['color'] != 'red') {
+  if (!empty($variables['options']['color']) && $variables['options']['color'] != 'red') {
     $query['color'] = $variables['options']['color'];
   }
-  if ($variables['options']['autohide'] != '2') {
+  if (!empty($variables['options']['autohide']) && $variables['options']['autohide'] != '2') {
     $query['autohide'] = $variables['options']['autohide'];
   }
 
   // Non-query options.
-  if ($variables['options']['nocookie']) {
+  if (!empty($variables['options']['nocookie'])) {
     $url_base = 'youtube-nocookie.com';
   }
   else {
     $url_base = 'youtube.com';
   }
 
-  if ($variables['options']['protocol_specify']) {
+  if (!empty($variables['options']['protocol_specify'])) {
     $protocol = $variables['options']['protocol'];
   }
   else {
@@ -92,7 +92,9 @@ function media_youtube_preprocess_media_youtube_video(&$variables) {
 
   // Add some options as their own template variables.
   foreach (array('width', 'height') as $theme_var) {
-    $variables[$theme_var] = $variables['options'][$theme_var];
+    if (isset($variables['options'][$theme_var])) {
+      $variables[$theme_var] = $variables['options'][$theme_var];
+    }
   }
 
   // Do something useful with the overridden attributes from the file