#youtube-player-container {
    position: relative;
    overflow: hidden;
    width: 100%;
    padding-top: 56.25%;
    margin-bottom: 1rem;
}

#youtube-player {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
}