I recently read an article on CSS Tricks about achieving a modern layout using CSS grid that allows your text to be a fixed width for optimal reading and allowing select images to to span the full width of your page or container.
This challenge came from a couple of questions in the facebook group: How do I center a 1/2 column in desktop and have it be full width on smaller screens? How do I keep an image focal point correct on mobile?
The YouTube video parameters allow you to control some of the features that the embedded player has enabled by default. Some have changed over the years and others are not quite as functional as one might like.