diff --git a/assets/script.js b/assets/script.js
index 90650d4..141088a 100644
--- a/assets/script.js
+++ b/assets/script.js
@@ -44,8 +44,10 @@ document.addEventListener("DOMContentLoaded", function() {
     "\\farad": "\\text{F}",
     "\\coulomb": "\\text{C}",
     "\\ohm": "\\Omega",
+    "\\Ohm": "\\Omega",
     "\\weber": "\\text{Wb}",
     "\\tesla": "\\text{T}",
+    "\\bit": "\\text{b}",
   };
 
   renderMathInElement(document.body, {
diff --git a/templates/html/index.html b/templates/html/index.html
index 02e4da6..597dde2 100644
--- a/templates/html/index.html
+++ b/templates/html/index.html
@@ -118,10 +118,11 @@
       <div class="feature-icon bg-primary bg-gradient">
         <svg xmlns="http://www.w3.org/2000/svg" height="48" viewBox="0 -960 960 960" width="48" fill="#5f6368"><path d="m380-300 280-180-280-180v360ZM160-160q-33 0-56.5-23.5T80-240v-480q0-33 23.5-56.5T160-800h640q33 0 56.5 23.5T880-720v480q0 33-23.5 56.5T800-160H160Zm0-80h640v-480H160v480Zm0 0v-480 480Z"/></svg>
       </div>
-      <h2>Videokurs Klasse N</h2>
+      <h2>Videokurse</h2>
       <p>In Zusammenarbeit mit DL2YMR ist ein Videokurs für die Klasse N entstanden, der auf seinem YouTube-Kanal abrufbar ist.</p>
       <div class="d-grid gap-2 d-md-block mb-5">
-        <a href="https://www.youtube.com/playlist?list=PLDpWnjHk5ERbcgpLPUaU0iTsD-wrmfENk" class="btn btn-primary">Zum Videokurs</a>
+        <a href="https://www.youtube.com/playlist?list=PLDpWnjHk5ERbcgpLPUaU0iTsD-wrmfENk" class="btn btn-primary">Zum Videokurs Klasse N</a>
+        <a href="https://www.youtube.com/playlist?list=PL_JZo16Mzs5XGeN5N81MwQ70dp7478VkM" class="btn btn-primary">Vorlesung Klasse N+E</a>
       </div>
     </div>
     <div class="feature col">
diff --git a/templates/html/page.html b/templates/html/page.html
index 41982a1..e187762 100644
--- a/templates/html/page.html
+++ b/templates/html/page.html
@@ -127,7 +127,7 @@
                 <div class="d-flex flex-column align-items-center">
                   <div class="d-flex gap-1 align-items-center mb-1">
                     Mit
-                    <svg class="text-primary" xmlns="http://www.w3.org/2000/svg" width="1rem" height="1rem" fill="currentColor" viewBox="0 0 512 512"><path d="M47.6 300.4L228.3 469.1c7.5 7 17.4 10.9 27.7 10.9s20.2-3.9 27.7-10.9L464.4 300.4c30.4-28.3 47.6-68 47.6-109.5v-5.8c0-69.9-50.5-129.5-119.4-141C347 36.5 300.6 51.4 268 84L256 96 244 84c-32.6-32.6-79-47.5-124.6-39.9C50.5 55.6 0 115.2 0 185.1v5.8c0 41.5 17.2 81.2 47.6 109.5z"/></svg></span>
+                    <svg class="text-primary" xmlns="http://www.w3.org/2000/svg" width="1rem" height="1rem" fill="#FE756C" viewBox="0 0 512 512"><path d="M47.6 300.4L228.3 469.1c7.5 7 17.4 10.9 27.7 10.9s20.2-3.9 27.7-10.9L464.4 300.4c30.4-28.3 47.6-68 47.6-109.5v-5.8c0-69.9-50.5-129.5-119.4-141C347 36.5 300.6 51.4 268 84L256 96 244 84c-32.6-32.6-79-47.5-124.6-39.9C50.5 55.6 0 115.2 0 185.1v5.8c0 41.5 17.2 81.2 47.6 109.5z"/></svg></span>
                     vom <a class=link-secondary href="/infos#contributors">50ohm-Team</a> entwickelt
                   </div>
                   <div class="mb-1">Ein Angebot des Deutschen Amateur-Radio-Clubs e.&nbsp;V.</div>