#myVideo {
        position: relative;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100%;
    }
.contents {
        position: relative;
        bottom: 100px;
        background: rgba(0, 0, 0, 0.4);
        color: #f1f1f1;
        width: 100%;
        padding: 20px;

    }
#myBtns {
        width: 200px;
        font-size: 18px;
        padding: 10px;
        border: none;
        background: #f1f1f1;
        color: #000;
        cursor: pointer;
    }

#collapsibles {
padding: 18px;
        width: 100%;
        border: none;
        text-align: left;
        outline: none;
        font-size: 30px;
}

.moda-body.dr_menu{
     z-index: 2000;
}
.moda-body.dr_menu_li{
    z-index: 2000;
}