diff --git a/app/models/environment.rb b/app/models/environment.rb
index 72484d1..fe324fa 100644
--- a/app/models/environment.rb
+++ b/app/models/environment.rb
@@ -219,7 +219,7 @@ class Environment < ActiveRecord::Base
   settings_items :currency_separator, :type => String, :default => '.'
   settings_items :currency_delimiter, :type => String, :default => ','
 
-  settings_items :trusted_sites_for_iframe, :type => Array, :default => ['itheora.org', 'tv.softwarelivre.org', 'stream.softwarelivre.org']
+  settings_items :trusted_sites_for_iframe, :type => Array, :default => ['itheora.org', 'tv.softwarelivre.org', 'stream.softwarelivre.org', 'www.youtube.com']
 
   settings_items :enabled_plugins, :type => Array, :default => []
 
diff --git a/test/unit/environment_test.rb b/test/unit/environment_test.rb
index c08ec47..f5982d2 100644
--- a/test/unit/environment_test.rb
+++ b/test/unit/environment_test.rb
@@ -1070,7 +1070,7 @@ class EnvironmentTest < Test::Unit::TestCase
   end
 
   should 'have a list of trusted sites by default' do
-    assert_equal ['itheora.org', 'tv.softwarelivre.org', 'stream.softwarelivre.org'], Environment.new.trusted_sites_for_iframe
+    assert_equal ['itheora.org', 'tv.softwarelivre.org', 'stream.softwarelivre.org', 'www.youtube.com'], Environment.new.trusted_sites_for_iframe
   end
 
   should 'have a list of trusted sites' do
--
libgit2 0.21.2