jellyfish-web/src/plugins/youtubePlayer/style.scss

.youtubePlayerContainer {
    background: #000 !important;
    position: fixed !important;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
}

.youtubePlayerContainer.onTop {
    z-index: 1000;
}

.youtubePlayerContainer video {
    margin: 0 !important;
    padding: 0 !important;
    width: 100%;
    height: 100%;
}