diff --git a/doc/conf.py b/doc/conf.py
index dc2f9f0..2c94dec 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -31,7 +31,9 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = ['sphinx.ext.intersphinx',
-    'sphinx.ext.githubpages']
+              'sphinx.ext.githubpages',
+              'sphinxcontrib.youtube',
+]
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']