There was a time when opening HBO Max meant making a commitment. You were there for a prestige drama, a three-hour movie, a carefully curated documentary, or perhaps a late-night spiral through the back catalog. The service was built around the idea that television and film deserved your attention – preferably a lot of it.

Now, it also wants a few seconds of your thumb.

HBO Max has launched “HBO Max Shorts,” a vertical, scrollable feed of trailers, clips and bonus material designed to help subscribers find something to watch. It sits in the mobile app’s bottom navigation, inviting users to swipe through memorable scenes and jump straight into a film or series, or save it to My List. The feature is initially being tested with select iOS users in the US.

It is a familiar move, almost aggressively so. The streaming era has spent years trying to solve the discovery problem: people subscribe to more services, libraries grow larger, and the simple task of choosing a show somehow becomes harder. Netflix has its autoplaying previews and mobile clips. TikTok, YouTube Shorts and Instagram Reels have trained audiences to treat a full-screen vertical feed as the internet’s default interface for finding the next thing to care about.

HBO Max is acknowledging that this behavior has moved beyond social media. If people are already conditioned to swipe their way through recommendations, why force them to browse static artwork in horizontal rows?

The idea is not that HBO Max suddenly wants to become TikTok. At least not exactly. Its pitch is that short video can be a better trailer than a traditional trailer. Instead of presenting the polished two-minute marketing package, the feed can surface a great line reading, a climactic exchange, a weirdly funny scene, or the kind of image that makes someone stop and think, “Wait, what is this?” The goal is not merely to keep people scrolling. It is to turn that moment of curiosity into an actual viewing session.

That distinction matters. Social video feeds are often optimized for continued consumption within the feed itself. HBO Max Shorts is meant to function as a doorway into longer programming. If a clip works, a subscriber can begin watching the title immediately or add it to their watchlist.

The machinery behind it is a particularly revealing part of the announcement. Warner Bros. Discovery says the clips are assisted by an in-house AI tool that uses scene-level metadata to search through thousands of hours of programming and suggest potentially compelling moments. Human editors then decide which clips best represent the title, before the selections are reformatted for a vertical mobile-video experience.

That is a sensible division of labor, and probably a more interesting use of AI than the usual promise of making everything fully automated. Machines can do the tedious first pass across a vast catalog, flagging scenes based on available data and patterns. But the editorial choice – whether a clip is funny out of context, whether it gives away too much, whether it captures the actual appeal of a series rather than its most sensational moment – is still a human judgment.

For HBO in particular, that human layer is important. A service that has spent decades associating itself with carefully made television has more to lose than most if its shows begin to feel like raw material for an endless content mill. A scene from The Sopranos, The Last of Us, The White Lotus or an HBO documentary can be a powerful hook, but it can also be flattened when removed from the pacing and context that made it work. The short-form format is excellent at selling a moment; it is less reliable at explaining why a story deserves hours of someone’s time.

Still, HBO Max does not have much choice but to meet viewers where they are. Discovery has become one of streaming’s central challenges, especially when the average subscriber is confronted with a library that includes HBO originals, Warner Bros. movies, DC titles, reality programming, catalog television and more. More choice has not necessarily made choosing easier.

That is why the company is pairing Shorts with another mobile experiment: conversational search. Available initially to adult users in the US on Android under “Ask HBO Max,” the feature lets select subscribers use natural-language requests such as “in the mood for a comedy” or “dysfunctional family drama,” rather than relying only on title names, actors or standard genre filters.

Taken together, the two features describe a streaming app trying to adapt to two distinct viewing moods. One is passive: show me something interesting while I scroll. The other is intentional: I know roughly what I want, but I cannot name it. Both are attempts to get past the blank, mildly stressful question that follows every streaming-app launch: what should I watch?

The format also quietly shifts the role of trailers. For decades, trailers have been fixed promotional objects, produced well before release and distributed widely across television, theaters and the web. The short-form feed turns the trailer into something more fluid. A service can test different scenes, vary what it presents to different viewers and learn from what people tap, skip or save.

That personalization is explicitly part of HBO Max Shorts. The company says each feed is tailored to a subscriber’s tastes and viewing history, with plans to expand the product to more devices and markets, refine it as people interact with it, and eventually add sports content.

There is a trade-off, of course. Recommendation systems can make a service more useful, but they can also make it narrower. If the app consistently decides that someone is a “crime drama person” or a “reality TV person,” it may keep serving variations of that same category instead of offering the delightful left turn that makes a big library worthwhile. The best streaming discovery tool should not only predict what viewers already like. It should occasionally make a case for something they would not have picked themselves.

That is the real test for HBO Max Shorts. It is easy to imagine the feature becoming another place to watch dramatic reaction shots and familiar scenes from titles subscribers already know. It is harder, and more valuable, to imagine it leading someone to an underseen foreign film, a decades-old HBO series, a documentary they would never have searched for, or an unexpected Warner Bros. classic.

For now, the feature is an experiment, not a redefinition of the service. But its arrival says something larger about where streaming is going. The battle is no longer only over who has the biggest shows or the strongest franchises. It is increasingly about the interface: who can turn an overwhelming catalog into a decision that takes seconds instead of half an hour.

Even HBO Max, home to some of television’s most patient storytelling, has joined the scroll. The next question is whether a few well-chosen seconds can still convince viewers to stay for the whole story.