.cus_box{
    display: table;
    margin: auto;
    padding:0;
}
.videoWrap{
    display: block;
    margin: 20px auto 0 auto;
    padding:0;
    width: 100%;
    max-width: 320px;
}
.videoWrap video{
    display: block;
    margin: 0 auto;
    padding:0;
    width: 100%;
}
#entry_button_area, #guide_link, #cancel_button_area, #confirm_button_area{
    min-width: auto;
}

video {
    float: none;
    height: auto;
    width: 100%;
}

@media screen and (max-width: 800px) {
    .videoWrap{
        display: block;
        margin: 20px auto 0 auto;
        padding:0;
        width: 100%;
        max-width: 100%;
    }
    
}