jellyfish-web/src/components/youtubeplayer/style.css

.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%;
    }