cross_promote.py maintains the "More Stories You Will Love" section in every video description. This section contains links to your other channels. When a viewer finds one of your channels, they are presented with direct links to all your other content -- automatically, on every video, without any manual description editing.
How the Link Rotation Works
The script does not add all 10 other channels to every description. Instead, it rotates the recommended channels on each video, ensuring every channel in the network appears in descriptions proportionally. Channel A promotes channels B, D, and G. Channel B promotes channels A, E, and H. Every channel gets exposure without any single description becoming a link dump.
Why This Matters for Growth
A viewer who subscribes to one channel in your network is statistically likely to subscribe to others with related content. Cross-promotion accelerates the subscriber growth rate of newer channels by routing established channel traffic to them.