Remove Smorgasbord instructions and update video

welcome.html

@@ -97,11 +97,7 @@ <h1>Welcome to the Bioconductor Workshop Galaxy!</h1>
         </ol></p>
         <br><br>
         <p>The following video will introduce you to the Bioconductor Workshop Galaxy platform!</p>
-        <iframe src="https://www.youtube.com/embed/2ErhMCctZaY"></iframe>
-        <br>
-        <p>You can also find detailed (with screenshots) instructions on using the Bioconductor Workshop Galaxy, including launching and stopping workshops, by clicking the button below.</p>
-        <p><a href="usage.html" class="button" target="_self">Usage Instructions</a></p>
-        </div>
+        <iframe src="https://www.youtube.com/embed/uv1vGXLY0Mg"></iframe>
     </div>
     <div class="footer">
         <p><a href="tos.html">Terms of Service</a> and <a href="privacy-policy.html">Privacy Policy</a></p>