ladislav.soukup

This is simple shortcode to embed responsive iframe to your post. Iframe will hold the specified ratio when page is rescaled.
[rframe ratio=”16×9″ src=”http://flixel.com/player/snqi608mlq1h98w5p9jy” width=”60%” /]
<h4>How it Works</h4>
DIV block with specified width is creted. Inside is transparent PNG file with specifed ratio scaled to 100% width and height set to auto. This image will scale the main DIV to size with correct ratio. 
Embeded IFRAME is then set to fill the wrapper DIV, so it is scaled with the image. 
Image is created on the fly via PHP and inserted as inline image directly to src attribute of img tag.
<h4>Credit</h4>
Thanks to Masau ( http://jsfiddle.net/Masau/7WRHM/ ) for the “trick”.

SB-ResponseFrame

This is simple shortcode to embed responsive (fixed-ratio) iframes

unapersona

Easily insert iframes inside the block editor.
This plugin adds an Iframe block inside the Embeds category.
Insert an external (or internal) URL by simple drag and dropping the Simple Iframe block.

Simple Iframe

No more edit the html of the iframe, put easily in block editor with height and width.
Great Job Jorge!!!

Great as simple

Works flawlessly, it does what it says it does and what it has to do. It's a perfect solution to show external contents with an iframe solution.

This is "a must" block.

Perfect solution for iframe content

Lo necesitaba, así evito añadir una colección de bloques para usar solo uno.

Sencillo y útil.

It is not necessary to create plugins with many functions, thanks Jorge for the contribution!

Simple and great

Easily insert iframes inside the block editor.

SB-ResponseFrame vs Simple Iframe