Sidebar Embed Paragraph
If you need to insert some external iframe to your website, use Side Embed Paragraph. It is perfect for maps and videos. Below you can a fully responsive Google Maps widget. It stretches when you resize the browser window.
There is a "Full width" layout available. It spans the embed 100% width and pulls the description to the left. If you select the "Invert colors" option, the text background becomes white.
Side Embed can contain a video from YouTube, Dailymotion, and other providers. Just copy the iframe code to the system. The responsiveness of the video depends on its source, as you can see below, Youtube embeds do not stretch in the container. Instead, they get black borders.