Responsive iframes — The Right Way (CSS Only)! | Ben Marshall
Recreating Responsive Iframe Embed Generator
How to embed responsive and fast loading iframe to your site?
Giphy Embed Code Generator | embed.tube
Online HTML5 iFrame Code Generator
GitHub - siongui/responsive-embed-generator: HTML/CSS code generator for responsively embedding YouTube, Facebook post, Google Maps, or Google Forms, etc.
Responsive IFrames Plugin For jQuery | Free jQuery Plugins