Responsive Video
Make any video you add via an iframe, embed, object or video tag automagically responsive by adding the dcs-responsive class to it.
<iframe class="dcs-responsive" width="560" height="315" src="https://www.youtube.com/embed/__5WW_1wC_A" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>Renders: