YouTube is now introducing QR codes to all channels, following a successful test phase with selected channels. This feature allows users to easily promote their YouTube content by providing a scannable QR code that links directly to their channel. Users can find their QR code in the YouTube app under the "You" tab, by selecting "Share Channel" and then "QR code". This code can be saved or shown to others for easy scanning.

While QR codes have not been widely adopted outside of specific uses like supermarket checkouts, there may be a renewed interest in their application. Instagram is also testing similar profile card feature, suggesting a potential shift in user behavior. Despite their cyclical popularity, QR codes offer a streamlined way to connect with new subscribers and promote content, making them worth experimenting with.