MDL-57616 label: allow to drag and drop video/audio files

mod/label/lang/en/label.php

@@ -29,7 +29,7 @@ $string['configdndresizewidth'] = 'When a label is created from a dragged & drop
 $string['dndmedia'] = 'Media drag and drop';
 $string['dndresizeheight'] = 'Resize drag and drop height';
 $string['dndresizewidth'] = 'Resize drag and drop width';
-$string['dnduploadlabel'] = 'Add image to course page';
+$string['dnduploadlabel'] = 'Add media to course page';
 $string['dnduploadlabeltext'] = 'Add a label to the course page';
 $string['label:addinstance'] = 'Add a new label';
 $string['labeltext'] = 'Label text';

mod/label/lib.php

@@ -192,7 +192,7 @@ function label_supports($feature) {
 function label_dndupload_register() {
     $strdnd = get_string('dnduploadlabel', 'mod_label');
     if (get_config('label', 'dndmedia')) {
-        $mediaextensions = file_get_typegroup('extension', 'web_image');
+        $mediaextensions = file_get_typegroup('extension', ['web_image', 'web_video', 'web_audio']);
         $files = array();
         foreach ($mediaextensions as $extn) {
             $extn = trim($extn, '.');