background url mp4 code example

Example: how to set background video in html

<div class="fullscreen-bg">
    <video loop muted autoplay poster="img/videoframe.jpg" class="fullscreen-bg__video">
        <source src="video/big_buck_bunny.webm" type="video/webm">
        <source src="video/big_buck_bunny.mp4" type="video/mp4">
        <source src="video/big_buck_bunny.ogv" type="video/ogg">
    </video>
</div>