<video playsinline autoplay muted loop poster="movie.jpg" id="bgvid">
<source src="movie.webm" type="video/webm">
<source src="movie.mp4" type="video/mp4">
<source src="movie.ogg" type="video/ogg">
</video>https://www.w3schools.com/howto/howto_css_fullscreen_video.asp
https://www.w3schools.com/html/html5_video.asp
http://thenewcode.com/777/Create-Fullscreen-HTML5-Page-Background-Video