[DOCS] Adds link to video landing page (#101413)

Author: gchaps

docs/index-extra-title-page.html

@@ -1,5 +1,6 @@
 <div class="legalnotice">
   <p>From creating beautiful visualizations to managing the Elastic Stack, learn how Kibana helps you get the most of your data.</p>
+  <p><a href="https://www.elastic.co/videos/training-how-to-stack">Watch our videos</a></p>
   <table style="width:100%">
   <tr>
     <th><h3>New to Kibana?</h3></th>
@@ -11,8 +12,8 @@
         <ul class="itemizedlist" type="disc">
           <li class="listitem"><a href="https://www.elastic.co/guide/en/kibana/current/introduction.html">What is Kibana?</a></li>
           <li class="listitem"><a href="https://www.elastic.co/guide/en/kibana/current/get-started.html">Quick start</a>
-          <li class="listitem"><a href="https://www.elastic.co/guide/en/kibana/current/dashboard.html">Create a dashboard</a></li>
           <li class="listitem"><a href="https://www.elastic.co/guide/en/kibana/current/connect-to-elasticsearch.html">Add data</a></li>
+          <li class="listitem"><a href="https://www.elastic.co/guide/en/kibana/current/dashboard.html">Create a dashboard</a></li>
           <li class="listitem"><a href="https://www.elastic.co/guide/en/kibana/current/discover.html">Search your data</a>
           </li>
         </ul>