build a custom YouTube HTML5 player on CodePen by utilizing the YouTube IFrame Player API

fsBtn.addEventListener('click', () => if (!document.fullscreenElement) player.requestFullscreen(); else document.exitFullscreen(); ); .controls-center order: 3; width: 100%; margin-top: 0.3rem;

• Play/pause toggle
• Progress bar seek & update
• Time display
• Fullscreen mode

video.addEventListener('progress', () => { try const buffered = video.buffered; if (buffered.length) const end = buffered.end(buffered.length -1); const pct = (end / video.duration) * 100; buffer.style.width = pct + '%'; // close menu on clicking outside document.addEventListener('click', (e) => if (!speedBtn.contains(e.target) && !speedMenu.contains(e.target)) speedMenu.classList.remove('show');