The First Frame and Retention

On an autoplay feed, the viewer did not choose your video, the algorithm did, and they will swipe past in under two seconds unless something stops them. That means the opening frame is doing the work of a thumbnail. Do not open on an empty canvas or a slow build. Open on motion, colour, and a clear question the viewer wants answered.

The strongest short-form clips pose a question in the first second and answer it at the end. "Will the ball escape all 20 rings?" "How many balls before the screen fills?" "Which colour wins?" A title hook at the top of the frame states the question in words; the simulation answers it in motion. The gap between the question and its answer is the reason a viewer stays.

Retention is highest when the payoff lands cleanly at the end. Use the Seed Generator (in the Physics tab) to make a run finish at a target length, and time your audio so the busiest, most satisfying moment lands on a beat near the end. A clip that resolves at exactly the right moment feels designed; one that fizzles out or overruns loses the last few seconds of watch time.

Short clips get watched to completion, and completion is the single strongest signal you can send the algorithm. A tight 15 to 30 second clip that a viewer finishes beats a 60 second clip they abandon halfway. If a run has a slow section, cut it, start closer to the action and end right on the payoff.