iframe {
    width: 1170px;
    height: 600px;
}

@media (max-width:1200px) {
    iframe {
        width: 720px;
        height: 370px;
    }
}

@media (max-width:768px) {
    iframe {
        width: 450px;
        height: 231px;
    }
}

@media (max-width:480px) {
    iframe {
        width: 300px;
        height: 154px;
    }
}