Building a QR Code by Hand to Explain How It Works
Veritasium · Explainer · 35 min · 2024 · YouTube title: I built a QR code with my bare hands to see how it works
Why it's here
HN points to it as a recent, well-made explanation of QR code structure and error correction.
What it covers
Veritasium builds a QR code by hand to explain how it works. It covers the history of Morse code and barcodes, how QR codes encode data, why damaged codes still scan, and how safe they are.