You don’t need to do anything! Just install and go! Responsive Embeds works by wrapping iframe elements with an HTML <div> via jQuery, and then applying some groovy CSS Software Requirements In addition to the WordPress® Requirements, Responsive Embeds requires the following: jQuery v1.12.4+ (this comes with WordPress®) License Copyright: © 2017 Philip K Meadows (coded in Great Britain) Released under the terms of the GNU General Public License. Credits / Additional Acknowledgments Software designed for WordPress®. GPL License https://codex.wordpress.org/GPL WordPress® http://wordpress.org Some JavaScript extensions require jQuery. GPL-Compatible License http://jquery.org/license jQuery http://jquery.com/