DIV.container{
    display: flex;
    justify-content: center;

    width: 100%;
    height:100%;
}

DIV.video{
    align-self: center;
}

DIV.subtitle{
    position: absolute;
    bottom: 10%;
    width: auto;
    height: auto;
    padding: 10px;
    visibility: hidden;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    text-align: center;
    font-size: x-large;
}