Reels and Shorts with AI: From Idea to Publishing

Making Reels and Shorts with AI lets you publish short vertical videos consistently, even when you have no time, lighting or location for a shoot. A model generates shots from text or animates your photos, adds sound and music, and you get to focus on what matters most: the idea and the hook.

We at WebTerra AI will walk through the whole path: coming up with a video, holding attention in the first seconds, generating 9:16 shots, choosing sound and turning one winning clip into a series. A fair warning: no model guarantees virality. What it does is remove technical limits and let you test more ideas in the same amount of time.

Step 1. Idea and hook

A short video lives or dies in the first one or two seconds. People scroll and stop only when something breaks their expectations. Hooks that work:

• Visual paradox: a cat in a spacesuit, coffee pouring upward, a miniature city.
• Transformation: "before" in the first frame, "after" in the last.
• On-screen question: "What happens if...?", answered in the clip.
• Camera movement: a fast flythrough or a push-in to a detail.
• Sound: an unexpected audio cue from the very first frame.

Sum up your idea in one sentence, such as "A morning in a potter's studio in 10 seconds". If you can't, the idea isn't ready yet.

Step 2. The 9:16 format and length

Vertical 9:16 is the standard for Reels, Shorts and TikTok. Set it at generation time rather than cropping a horizontal video, or you'll lose part of the frame. Keep the main subject centred and leave the top and bottom lighter, because captions and interface buttons appear there.

For a start, aim for 7 to 20 seconds. Shorter clips are watched to the end and replayed more often.

Step 3. Generating shots: which model to use

Kling 3.0: for most videos

Kling 3.0 supports 9:16, flexible lengths from 3 to 15 seconds and a first-and-last-frame mode that's ideal for transformations. It handles portraits well, so it suits clips with people.

Veo 3.1: when sound is the hook

Veo 3.1 generates video with synchronized sound: crackles, splashes, rumbles. For short videos where audio holds attention, that's a big advantage.

Seedance 2.5: for stories with a hero

Seedance 2.5 is the best at keeping a character consistent across shots, adds synchronized sound and generates up to 30 seconds. It's the pick for series with a recurring character. Note that it sometimes rejects photos with real faces, so for portraits of real people choose Kling 3.0 or Veo 3.1.

Draft first, then the final

Don't spend a premium generation on an untested idea. Make a 3 to 5 second version in Kling 3.0 first and see whether the hook lands. If it does, render the full-length clip or switch to a model with sound. If not, change the first action or the camera move. This way you can test three or four ideas for the price of one long clip, and credits for failed generations are refunded.

Step 4. Sound and music

Most Reels viewers watch with sound on, and the right music sets the rhythm of the edit. ElevenLabs Music creates a 30-second track with clean studio sound, the perfect length for a short video. Describe the genre, mood and tempo. Tracks start at 102 credits. Learn more about music models on the AI music page.

Tip: if your video model already generates sound, as Veo 3.1 and Seedance 2.5 do, keep the music low so it doesn't drown out the natural sounds of the scene.

Step 5. Series, not one-offs

A single video is a lottery ticket. A series is a system. When something works, repeat the format with variations:

• Same hook, different subjects: "What [object] would look like in miniature".
• A recurring character: one hero in different situations, where Seedance 2.5 shines.
• Weekly slots: "Monday motivation", "Friday mood".
• Trending scenarios: ready-made templates in the Trends section of your dashboard.

Save a successful prompt as a template and change just one variable at a time. The series stays cohesive, and you learn what actually drives results.

Step 6. Publishing

• Pick the most striking frame as the cover, not just any frame.
• Keep the caption short, with a question or a call to comment.
• Add subtitles or on-screen text, since some viewers watch muted.
• Label AI content according to your platform's rules on generated media.
• Stay consistent: three videos a week, every week, beats ten in a day followed by silence.

Ready-to-use prompts

All of these are written for 9:16.

Visual paradox (Kling 3.0):

Vertical 9:16, a tiny astronaut walking across a giant coffee cup like a planet surface, steam rising like clouds, slow camera orbit, cinematic macro shot, warm morning light

Sound-driven hook (Veo 3.1):

Vertical 9:16, extreme close-up of a glass bottle being opened, fizzing drink poured over ice, loud satisfying crackle and fizz sounds, slow motion, bright summer light

A character for a series (Seedance 2.5):

Vertical 9:16, a small orange robot with round glowing eyes waters plants on a sunny balcony, then turns to the camera and waves, soft cheerful sounds, Pixar-like 3D style

Transformation (Kling 3.0, first and last frame):

Smooth transformation from an empty white room to a cozy living room with plants and warm lamps, furniture appearing one by one, static camera

Music (ElevenLabs Music):

Energetic upbeat pop track for short video, punchy drums, catchy synth hook in the first seconds, 120 BPM, no vocals

Common mistakes

• Cropping a horizontal video to 9:16 after generation.
• A slow start: the first three seconds are scenery with no action.
• Important text at the bottom of the frame, hidden by the caption and buttons.
• Several different ideas crammed into a 10-second clip.
• Music that drowns out the scene's sound.
• One-off videos with no series, so you never learn what works.
• Promising "100% viral" in the caption instead of asking an interesting question.

FAQ

Which model is best for Reels?

For most videos, Kling 3.0: it supports 9:16, flexible lengths and an affordable price. Choose Veo 3.1 for sound and Seedance 2.5 for series with a recurring hero.

How long should a video be?

Start with 7 to 20 seconds. Longer videos are worth it when you have a story that holds attention to the end.

Can I animate my own photo for a Reel?

Yes, all three models work from a photo. For portraits of real people, go with Kling 3.0 or Veo 3.1.

How much does one video cost?

It depends on the model and length, starting at 85 credits with Kling 3.0. See the pricing page for plans. Credits for failed generations are refunded.

Try it in WebTerra AI

Write down one idea with a strong hook and generate your first vertical video in the video generator. Video, music and trends are all in your WebTerra AI dashboard.