diff --git a/index.html b/index.html
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                         <span>程式碼託管平台</span>
                     </li>
+                    <li class="list-group-item list-group-item-action">
+                        <a href="https://yt-pinlin.herokuapp.com/" target="_blank">YouTube Together</a>
+                        <br>
+                        <span>和朋友一起同步播放 YouTube 影片</span>
+                    </li>
                     <li class="list-group-item list-group-item-action">
                         <a href="https://yuren-tw.github.io/textRevealer/" target="_blank">Text Revealer</a>
                         <br>