diff --git a/view/listFiles.json.php b/view/listFiles.json.php
index 1d08bd88a..4e6cd4b80 100644
--- a/view/listFiles.json.php
+++ b/view/listFiles.json.php
@@ -2,7 +2,11 @@
 require_once dirname(__FILE__) . '/../videos/configuration.php';
 require_once $global['systemRootPath'] . 'objects/Login.php';
 header('Content-Type: application/json');
+
+// Ensure extensions are in lowercase and unique
+$global['allowed'] = array_map('strtolower', $global['allowed']);
 $global['allowed'] = array_unique($global['allowed']);
+
 $files = array();
 if(Login::canBulkEncode()){
     if (!empty($_POST['path'])) {
@@ -10,29 +14,26 @@
         if (substr($path, -1) !== DIRECTORY_SEPARATOR) {
             $path .= DIRECTORY_SEPARATOR;
         }
-        //var_dump($path, file_exists($path));
+        
         if (file_exists($path)) {
-            if (defined( 'GLOB_BRACE' )) {
+            if (defined('GLOB_BRACE')) {
                 $extn = implode(",*.", $global['allowed']);
                 $extnLower = strtolower($extn);
                 $extnUpper = strtoupper($extn);
                 $filesStr = "{*." . $extn . ",*" . $extnLower . ",*" . $extnUpper . "}";
-                //var_dump($filesStr);
-                //echo $files;
                 $video_array = glob($path . $filesStr, GLOB_BRACE);
             } else {
-                //var_dump($global['allowed']);
                 $video_array = array();
                 foreach ($global['allowed'] as $value) {
-                    $video_array += glob($path . "*." . $value);
+                    $video_array = array_merge($video_array, glob($path . "*." . $value));
                 }
             }
+            
             $id = 0;
             foreach ($video_array as $key => $value) {
                 $path_parts = pathinfo($value);
                 $obj = new stdClass();
                 $obj->id = $id++;
-                //$obj->path_clean = ($value);
                 $obj->path = _utf8_encode($value);
                 $obj->name = _utf8_encode($path_parts['basename']);
                 $files[] = $obj;