body background: linear-gradient(145deg, #0a0f1c 0%, #0c1222 100%); min-height: 100vh; display: flex; justify-content: center; align-items: center; font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; padding: 24px;
video.addEventListener('play', () => console.log('Video playing'); ); youtube html5 video player codepen