body{
	background:url("https://ellijapan.jp/img/cit-image.jpg") #333;
background-attachment:fixed;
background-size:cover;
position:relative;
}

video{
	display:block;
}
 
#bg-video{
	position:fixed;
right:0;
bottom:0;
min-width:100%;
min-height:100%;
width:auto;
height:auto;
z-index:-1;
}