diff --git a/fields/youtube/field.php b/fields/youtube/field.php
index 96efd84..d4bce56 100644
--- a/fields/youtube/field.php
+++ b/fields/youtube/field.php
@@ -64,6 +64,8 @@
 
 				$field_param = explode('|', $field_value);
 
+				$url = '';
+
 				if (! empty($field_param[0]))
 					$url = youtube_url_parser($field_param[0], $field_param[4]);
 
diff --git a/fields/youtube/tpl/field-doc.tpl b/fields/youtube/tpl/field-doc.tpl
index dabc99e..fb8cc42 100644
--- a/fields/youtube/tpl/field-doc.tpl
+++ b/fields/youtube/tpl/field-doc.tpl
@@ -1,4 +1,4 @@
-{if $param.4 == 'embed'}
+{if isset($param.4) && $param.4 == 'embed'}
 
 <object width="{$param.1}" height="{$param.2}">
 	<param name="movie" value="{$video_url}" />
@@ -9,6 +9,6 @@
 
 {else}
 
-<iframe width="{$param.1}" height="{$param.2}" src="{$video_url}" frameborder="0" {if $param.3 == 'true'}allowfullscreen{/if}></iframe>
+<iframe width="{$param.1}" height="{$param.2}" src="{$video_url}" frameborder="0" {if isset($param.3) && $param.3 == 'true'}allowfullscreen{/if}></iframe>
 
 {/if}
\ No newline at end of file