Short-Form Video
Definition
Video short enough to watch without deciding to. Under 60 seconds, vertical at 9:16, and built to be understood with the sound off. TikTok, Reels, and Shorts all run on it, and their ceilings differ: 60 seconds on TikTok and Shorts, 90 on Reels.
The format is a set of constraints rather than a length. Vertical, because the phone is already vertical. Captioned, because roughly 85% of social video is watched on mute. Front-loaded, because the feed hands you a viewer who has not yet decided to watch. And finite in a way long-form is not, since the real ceiling is somebody's patience rather than the runtime.
Those constraints have edges you can measure. On a 9:16 frame the platform's own interface takes the top 8% for the status bar and header, the right 12% for the like and share column, and the bottom 18% for the caption and the progress bar. Put key text in any of those strips and TikTok covers it with its own chrome. The usable middle is what you actually get to compose in.
Durations are not equal across apps. TikTok and YouTube Shorts both cut off at 60 seconds while Instagram Reels allows 90, so a 75-second cut posts cleanly to exactly one of the three. Plenty of creators write to 45 and stop arguing with the ceilings entirely.
The reason the format took over is unglamorous: it is the cheapest content to consume, and since the tooling caught up, the cheapest to produce. A creator in 2019 needed a camera, a lavalier, a light, and most of an afternoon. The same creator now needs an idea and a script, and the render happens while they write the next one.
None of that makes short-form easy. It makes it fast, and fast only helps if the first line is worth staying for. Volume without a hook produces more videos nobody finished.
Related
Related terms
Narration spoken by a model instead of a person. You hand it text, it hands back audio with pacing, emphasis, and breath in roughly the right places. Good enough on a 30-second clip that most listeners never think about it, and cheap enough that you can redo the take forty times.
Video HookThe first one to three seconds, which is the whole audition. A viewer decides to stay or swipe before your second sentence lands, so the hook has to carry a promise the rest of the video pays off. Everything downstream inherits whatever audience the hook managed to keep.
CTA (Call-to-Action) in VideoThe line that tells a viewer what to do next. Follow, comment, tap the link, or buy. It usually lives in the last three to five seconds, and it works better when the ask is small and specific than when it is broad and polite.
AI Subtitle GenerationCaptions written and timed by software instead of typed by hand. There are two ways to get them: transcribe the audio, or take the text you already wrote and align it to the voice track. The second way cannot misspell a name, because it never guesses at what was said.
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