HBO Max tests a personalized vertical-video feed

• HBO Max Shorts is available through a dedicated icon in the HBO Max mobile app for select iOS users in the United States.
• The feed uses watch history to personalize clips.
• HBO Max says human editors use an in-house AI tool and scene-level metadata to select and create vertical video.
• The company plans to add more devices, markets and sports content.

The important distinction is that HBO Max is testing a product and editorial workflow, not commissioning a vertical slate. It becomes a buyer signal only if that test creates a demand for original format-native supply.

This is analysis, not verified fact.

Why It Matters

HBO Max is testing whether its library and editorial operations can produce a personalized mobile vertical-video product; no original-programming mandate has been announced.

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