FEATURE: ship lazyYT plugin by default

plugins/lazyYT/plugin.rb

@@ -0,0 +1,29 @@
+# name: lazyYT
+# about: Uses the lazyYT plugin to lazy load Youtube videos
+# version: 0.1
+# authors: Arpit Jalan
+
+# javascript
+register_asset "javascripts/lazyYT.js"
+register_asset "javascripts/initializers/lazyYT.js.es6"
+
+# stylesheet
+register_asset "stylesheets/lazyYT.css"
+
+# freedom patch YouTube Onebox
+class Onebox::Engine::YoutubeOnebox
+  include Onebox::Engine
+
+  def to_html
+    if video_id
+      # Avoid making HTTP requests if we are able to get the video ID from the
+      # URL.
+      html = "<div class=\"lazyYT\" data-youtube-id=\"#{video_id}\" data-width=\"480\" data-height=\"270\"></div>"
+    else
+      # Fall back to making HTTP requests.
+      html = raw[:html] || ""
+    end
+
+    rewrite_agnostic(append_params(html))
+  end
+end