added call to youtube video on cloning entries

Author: TomJaeger

docs/pro/entry_cloning.md

@@ -11,6 +11,12 @@
 
 Entry Cloning makes it possible to clone existing entries when ExpressionEngine Pro is installed.
 
+Check out our video tutorial on Cloning Entries!
+<div class="video-wrapper">
+<iframe src="https://www.youtube.com/embed/cSz7NZdQvGk?vq=HD1080" width="1920" height="1080" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
+
+</div>
+
 ## Enabling Entry Cloning
 ### Global
 Entry Cloning is enabled by default when ExpressionEngine Pro is installed. Entry Cloning can be disabled globally for your site via the [Pro Configuration](/pro/configuration.md) setting or the matching [Config Override.](/pro/configuration.md#enable_entry_cloning)