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

.text {
            position: relative; /*必ず必要*/
            z-index: 2;  /*必ず必要*/
            text-align:center;
            width:80%;
            padding:20px;
            margin: 0 auto;
            margin-top: 0px;
 }
.bgslideshow { position: fixed; left:0; top:0; z-index: -1; height: 100%; width: 100%; }  
.bgslideshow img { position: absolute; min-height: 100%; min-width: 800px; width: 100%; height: auto;left:0; top:0; }