diff --git a/app/SculpinKernel.php b/app/SculpinKernel.php
index 1780f6ee..7c58c926 100644
--- a/app/SculpinKernel.php
+++ b/app/SculpinKernel.php
@@ -14,7 +14,8 @@ class SculpinKernel extends AbstractKernel
     {
         return [
             'Tsphethean\Sculpin\Bundle\RelatedPostsBundle\SculpinRelatedPostsBundle',
-            'Opdavies\Sculpin\Bundle\ContentGeneratorBundle\SculpinContentGeneratorBundle'
+            'Opdavies\Sculpin\Bundle\ContentGeneratorBundle\SculpinContentGeneratorBundle',
+            'AppBundle\AppBundle'
         ];
     }
 }
diff --git a/composer.json b/composer.json
index f68a3342..f89fb927 100644
--- a/composer.json
+++ b/composer.json
@@ -19,5 +19,10 @@
         "behat/mink-extension": "*",
         "behat/mink-goutte-driver": "*",
         "opdavies/sculpin-content-generator-bundle": "@stable"
+    },
+    "autoload": {
+        "psr-4": {
+            "AppBundle\\": "src/AppBundle"
+        }
     }
 }
diff --git a/source/_talks/2012-09-05-what-is-this-drupal-thing.md b/source/_talks/2012-09-05-what-is-this-drupal-thing.md
index e311bbce..f32f5b97 100644
--- a/source/_talks/2012-09-05-what-is-this-drupal-thing.md
+++ b/source/_talks/2012-09-05-what-is-this-drupal-thing.md
@@ -14,5 +14,5 @@ tags:
     - unified-diff
 ---
 {% block video %}
-<iframe src="https://player.vimeo.com/video/49827006?title=0&portrait=0" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
+{{ vimeo('49827006')|raw }}
 {% endblock %}
diff --git a/source/_talks/2014-03-01-git-flow.md b/source/_talks/2014-03-01-git-flow.md
index 7137ea19..664925cb 100644
--- a/source/_talks/2014-03-01-git-flow.md
+++ b/source/_talks/2014-03-01-git-flow.md
@@ -22,7 +22,7 @@ tweets: yes
 {% endblock %}
 
 {% block video %}
-<iframe width="560" height="315" src="https://www.youtube.com/embed/T-miCpHxfds" frameborder="0" allowfullscreen></iframe>
+{{ youtube('T-miCpHxfds')|raw }}
 {% endblock %}
 
 {% block feedback %}
diff --git a/source/_talks/2015-04-08-drupal-8.md b/source/_talks/2015-04-08-drupal-8.md
index c4d93ec2..a2e7cb86 100644
--- a/source/_talks/2015-04-08-drupal-8.md
+++ b/source/_talks/2015-04-08-drupal-8.md
@@ -27,7 +27,7 @@ I categorised the technical changes into groups for site builders, developers an
 {% endblock %}
 
 {% block video %}
-<iframe width="560" height="315" src="https://www.youtube.com/embed/36zCxPrOOzM" frameborder="0" allowfullscreen></iframe>
+{{ youtube('36zCxPrOOzM')|raw }}
 {% endblock %}
 
 {% block feedback %}
diff --git a/source/_talks/2015-10-14-sculpin.md b/source/_talks/2015-10-14-sculpin.md
index a6be312a..f85609e9 100644
--- a/source/_talks/2015-10-14-sculpin.md
+++ b/source/_talks/2015-10-14-sculpin.md
@@ -28,7 +28,7 @@ You can [view the full slides](/slides/phpsw/building-static-websites-with-sculp
 {% endblock %}
 
 {% block video %}
-<iframe width="560" height="315" src="https://www.youtube.com/embed/aN53arCKZAU" frameborder="0" allowfullscreen></iframe>
+{{ youtube('aN53arCKZAU')|raw }}
 {% endblock %}
 
 {% block feedback %}
diff --git a/src/AppBundle/AppBundle.php b/src/AppBundle/AppBundle.php
new file mode 100644
index 00000000..05123b67
--- /dev/null
+++ b/src/AppBundle/AppBundle.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace AppBundle;
+
+use Symfony\Component\HttpKernel\Bundle\Bundle;
+
+class AppBundle extends Bundle
+{
+}
diff --git a/src/AppBundle/DependencyInjection/AppExtension.php b/src/AppBundle/DependencyInjection/AppExtension.php
new file mode 100644
index 00000000..ef0c117c
--- /dev/null
+++ b/src/AppBundle/DependencyInjection/AppExtension.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace AppBundle\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\Config\FileLocator;
+
+class AppExtension extends Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $loader = new YamlFileLoader($container, new FileLocator(__DIR__ . '/../config'));
+        $loader->load('services.yml');
+    }
+}
diff --git a/src/AppBundle/Twig/VimeoExtension.php b/src/AppBundle/Twig/VimeoExtension.php
new file mode 100644
index 00000000..6791988e
--- /dev/null
+++ b/src/AppBundle/Twig/VimeoExtension.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace AppBundle\Twig;
+
+use Twig_Extension;
+use Twig_SimpleFunction;
+
+class VimeoExtension extends Twig_Extension
+{
+    public function getFunctions()
+    {
+        return [
+          new Twig_SimpleFunction('vimeo', [$this, 'embedCode'])
+        ];
+    }
+
+    /**
+     * Generates the embed code for a video.
+     *
+     * @param $videoId
+     *   The ID of the video.
+     *
+     * @return string
+     */
+    public function embedCode($videoId)
+    {
+        return sprintf(
+            '<iframe src="https://player.vimeo.com/video/%s?title=0&portrait=0" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>',
+            $videoId
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'vimeo';
+    }
+
+}
diff --git a/src/AppBundle/Twig/YouTubeExtension.php b/src/AppBundle/Twig/YouTubeExtension.php
new file mode 100644
index 00000000..80bba926
--- /dev/null
+++ b/src/AppBundle/Twig/YouTubeExtension.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace AppBundle\Twig;
+
+use Twig_Extension;
+use Twig_SimpleFunction;
+
+class YouTubeExtension extends Twig_Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return [
+            new Twig_SimpleFunction('youtube', [$this, 'embedCode'])
+        ];
+    }
+
+    /**
+     * Generates the embed code for a video.
+     *
+     * @param $videoId
+     *   The ID of the video.
+     *
+     * @return string
+     */
+    public function embedCode($videoId)
+    {
+        return sprintf(
+            '<iframe width="560" height="315" src="https://www.youtube.com/embed/%s" frameborder="0" allowfullscreen></iframe>',
+            $videoId
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'youtube';
+    }
+
+}
diff --git a/src/AppBundle/config/services.yml b/src/AppBundle/config/services.yml
new file mode 100644
index 00000000..d3ea9bff
--- /dev/null
+++ b/src/AppBundle/config/services.yml
@@ -0,0 +1,9 @@
+services:
+    app.twig.vimeo:
+        class: AppBundle\Twig\VimeoExtension
+        tags:
+            - { name: twig.extension }
+    app.twig.youtube:
+        class: AppBundle\Twig\YouTubeExtension
+        tags:
+            - { name: twig.extension }