Vertical video is the discovery engine. Everything else is retention.
Short-form vertical is now the primary discovery format on every major platform. That changes what each channel is for, and what you should stop expecting from your feed posts.
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Instagram carousels through the API: the limits nobody documents together
The Instagram Graph API caps carousels at 10 slides, not the 20 the app allows, and every slide needs its own container first. What actually breaks, and how to schedule around it.
