Simple fluid-width videos using CSS only
npm install kickoff-fluidVideo.css --save
With scss and the npm-sass or similar importer
@import "kickoff-fluidVideo.css/index"
<div class="fluidVideo">
<iframe class="fluidVideo-item" src="..."/>
</div>
<!-- add modifier for 4:3 aspect ratio -->
<div class="fluidVideo fluidVideo--4-3">
<iframe class="fluidVideo-item" src="..."/>
</div>