[gh:style].embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }[/gh:style][gh:div class='embed-container'][gh:iframe width="100%" height="720" src="https://www.youtube.com/embed/xIr_ceDqirA" frameborder="0" allowfullscreen][/gh:iframe][/gh:div]There is an often repeated maxim in the [...]