diff --git a/templates/index.html b/templates/index.html
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+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>YouTube Downloader</title>
+    <style>
+        body { font-family: sans-serif; margin: 20px; background-color: #f4f4f4; color: #333; }
+        .container { background-color: #fff; padding: 20px; border-radius: 8px; box-shadow: 0 0 10px rgba(0,0,0,0.1); }
+        h1 { color: #c00; text-align: center; }
+        form { margin-bottom: 20px; display: flex; }
+        input[type="text"] { flex-grow: 1; padding: 10px; border: 1px solid #ddd; border-radius: 4px; margin-right: 10px;}
+        input[type="submit"] { padding: 10px 15px; background-color: #c00; color: white; border: none; border-radius: 4px; cursor: pointer; }
+        input[type="submit"]:hover { background-color: #a00; }
+        ul { list-style-type: none; padding: 0; }
+        li { background-color: #eee; margin-bottom: 8px; padding: 10px; border-radius: 4px; display: flex; justify-content: space-between; align-items: center; }
+        li a { text-decoration: none; color: #337ab7; }
+        li a:hover { text-decoration: underline; }
+        .message {
+            padding: 10px;
+            margin-bottom: 15px;
+            border-radius: 4px;
+        }
+        .success { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
+        .error { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
+        .info { background-color: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <h1>YouTube Video Downloader</h1>
+
+        {% with messages = get_flashed_messages(with_categories=true) %}
+            {% if messages %}
+                {% for category, message in messages %}
+                    <div class="message {{ category }}">{{ message }}</div>
+                {% endfor %}
+            {% endif %}
+        {% endwith %}
+
+        <form action="{{ url_for('download_video') }}" method="post">
+            <input type="text" name="youtube_url" placeholder="YouTube Video URL hier einfügen" required>
+            <input type="submit" value="Herunterladen">
+        </form>
+
+        <h2>Bereits heruntergeladene Videos:</h2>
+        {% if files %}
+            <ul>
+                {% for file in files %}
+                    <li>
+                        <a href="{{ url_for('play_video', filename=file) }}" target="_blank">{{ file }}</a>
+                    </li>
+                {% endfor %}
+            </ul>
+        {% else %}
+            <p>Noch keine Videos heruntergeladen.</p>
+        {% endif %}
+    </div>
+</body>
+</html>
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