diff --git a/classes/class.ilOpencastPageComponentPluginGUI.php b/classes/class.ilOpencastPageComponentPluginGUI.php
index 5ba14ab..b544910 100644
--- a/classes/class.ilOpencastPageComponentPluginGUI.php
+++ b/classes/class.ilOpencastPageComponentPluginGUI.php
@@ -525,10 +525,10 @@ protected function setStyleFromProps(ilTemplate $tpl, array $properties)
         $tpl->setVariable('RATIO', $ratio);
         $tpl->setVariable('MAX-WIDTH', $properties[self::PROP_WIDTH]);
         $tpl->setVariable('MAX-HEIGHT', $properties[self::PROP_HEIGHT]);
-        if ($properties[self::PROP_RESPONSIVE] != false) {
+        if ((bool)($properties[self::PROP_RESPONSIVE] ?? false) === true) {
             $tpl->setVariable('WIDTH', 'width:100%;');
         }
-        switch ($properties[self::PROP_POSITION]) {
+        switch ($properties[self::PROP_POSITION] ?? null) {
             case self::POSITION_CENTER:
                 $tpl->setVariable('CONTAINER_STYLE', 'text-align:center;');
                 break;