.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* Proporción de aspecto 16:9 (altura es 56.25% del ancho) */
    height: 0;
    overflow: hidden;
}

.video-container video,
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}