This is a rework of the plugin designed by frozeman and meedan adjusted for the specific use of embedding YouTube videos in a responsive way.

#Installing the MediaEmbed Plugin

1. Copy the "mediaembed" folder and place it in the ~/ckeditor/plugins directory.
2. Enable the plugin by changing or adding the extraPlugins line in your configuration (config.js):

   config.extraPlugins = 'mediaembed';

3. Add the button to your toolbar by adding the Mediaembed item to the toolbar list.
4. Include the styles/mediaembed.css file in the head of the page that the edited content will appear on.