diff --git a/modules/stuff.js b/modules/stuff.js
index 3918358..383c251 100644
--- a/modules/stuff.js
+++ b/modules/stuff.js
@@ -112,6 +112,7 @@ function appGetFileType (app, wildcard, contentType, pageToRender) {
 
 const fileTypes = [
   ['/*.mp4', 'video/mp4', 'stuff/video'],
+  ['/*.mkv', 'audio/x-matroska', 'stuff/video'],
   ['/*.mp3', 'audio/mpeg', 'stuff/audio'],
   ['/*.pdf', 'application/pdf'],
   ['/*.zip', 'application/zip']
diff --git a/public/moodle-test-userscript b/public/moodle-test-userscript
index fe74436..13de491 160000
--- a/public/moodle-test-userscript
+++ b/public/moodle-test-userscript
@@ -1 +1 @@
-Subproject commit fe74436ab119a31fdb35f7a3bbae50a572b0fb21
+Subproject commit 13de491da0290def7b357c7dafc12f22bfb77276
diff --git a/utils/question-classes b/utils/question-classes
index 0cfd9cf..100ca77 160000
--- a/utils/question-classes
+++ b/utils/question-classes
@@ -1 +1 @@
-Subproject commit 0cfd9cfda377ff8917df50e68f105ec43f5e9311
+Subproject commit 100ca7750d88400b227c9e1592300c4d1ea7db5c
diff --git a/views/qmining/man.ejs b/views/qmining/man.ejs
index 6d62ea9..8df7192 100644
--- a/views/qmining/man.ejs
+++ b/views/qmining/man.ejs
@@ -189,7 +189,11 @@
 			<b>4. Mi ez a ... ?</b>
 			</br>
 			<img height=40% src="img/imgq.jpg" alt="img"/>
-
+		</li>
+		<li>
+			<b>5.</b>
+			</br>
+			<img src="img/6.png" alt="img"/>
 		</li>
 		</p>
 		<li>
diff --git a/views/stuff/audio.ejs b/views/stuff/audio.ejs
index a1ee45d..6d5e3ae 100644
--- a/views/stuff/audio.ejs
+++ b/views/stuff/audio.ejs
@@ -21,11 +21,11 @@
       <h2>
         <%= fname %>
       </h2>
-      <image
+      <img
         id="coverArt"
         style="width:auto; max-height: 100%;"
-        onerror="this.style.display='none'"
         src="<%= url + albumArt %>"
+        alt=' '
       />
       <audio id="audioPlayer" controls style="width:100%"> 
         <source src="<%= url %><%= path %>?stream=true" type=<%= contentType %>>