#myVideo {
    height: 100%;
    width: 100%;
    object-fit: contain;
    /*use "cover" to avoid distortion position: absolute;
        position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;*/
}

#myBtn {
    position: absolute;
    z-index: 1;
    width: 90px;
    font-size: 16px;
    padding: 5px;
    border: none;
    background-color: transparent;
    /*background:#000;*/
    color: blue;
    cursor: pointer;
}

    #myBtn:hover {
        background: #ddd;
        color:blue;
    }

.contentVideo {
    position: fixed;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    color: #f1f1f1;
    width: 100%;
    padding: 20px;
}