Fireship

Fireship, run by Jeff Delaney, is famous for its '100 Seconds of Code' series that explains programming concepts, languages, and tools in under two minutes each. Beyond the YouTube channel (2M+ subscribers), Fireship.io offers paid courses on Next.js, Flutter, Firebase, Svelte, TypeScript, Docker, and more — all built around fast-paced, high-density teaching that respects your time. The free YouTube content alone covers dozens of frameworks and languages at a depth that rivals paid platforms.