by pianopj on WordPress.org
Makes iframes responsive using some lightweight JavaScript.
Add the “responsive-ignore” class to avoid this for a specific frame. Note that it needs to have a width and height. If the width is 100%, it will wrap based on its parent element and its height will remain the same.
This is simple shortcode to embed responsive (fixed-ratio) iframes
Allows the use of iframes in your blog using a custom shortcode
Finds invalid youtube videos (deleted or removed from youtube) embeded in your site.