HTML5 Video Cover Background
Use the "background-size: cover" effect for a video background.
HTML
<div>
<!-- Optional attributes, remove the features you don't want.
Add the "controls" attribute to get the video player buttons -->
<video autoplay loop muted>
<source src="http://www.taskgrids.com/temarry/wp-content/uploads/2018/08/Copy-of-Temarry-Recycling-Header-Video.mp4" type="video/mp4" />
</video>
</div>