Add embed for Coilpack Twig and Blade youtube video

Author: bryannielsen

docs/templates/index.mdx

@@ -24,6 +24,8 @@ You would do this by creating a file at `user/templates/blog.group/index.html.tw
 
 [Learn more about using Twig in ExpressionEngine from our guide](../guides/using-twig-templates.md).
 
+<iframe width="100%" style={{"aspect-ratio": "16 / 9"}} src="https://www.youtube.com/embed/rFdjkGSB5bI" title="How to use Twig and Blade in ExpressionEngine" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
 ## Twig and Blade in Laravel
 
 If you manage your templates inside your Laravel application you will just need to create files in your `resources/views` folder with either a `.twig` or a `.blade.php` extension and include them with the `view()` helper.  The Laravel documentation is a great resource for [learning more about views](https://laravel.com/docs/9.x/views#introduction).