Tutorial · 5 min
Vertical AI video for TikTok, Reels and Shorts
H3 Max outputs native 9:16. Here is how to use the 5-second clip as a repeatable short-form format.
Open the generator →
Opens the generator with this prompt filled in.
The 5-second rule
On Reels, Shorts, and TikTok, the first 2 seconds decide everything. A 5-second H3 Max clip with a single strong action (a product rotating, a character turning to camera, a landscape coming alive) is a complete piece of content — no filler.
Framing for 9:16
- Keep the action in the middle third; platforms crop edges.
- End with a hard cut — H3 Max clips end naturally, so no fade needed.
- Emphasise vertical movement: rising steam, falling snow, a looking-up tilt reads great in portrait.
Build a series, not a one-off
The repeatable format wins on these platforms: a consistent subject, a consistent color grade, and an evolving prompt. Example series: "A ceramic mug orbiting against different backgrounds each week". Viewers come back for the subject — you just swap the environment.