one-number-explains-video-gen

Create vertical data-stat hooks: hero number, ramping counter or graph, closing meaning line, timed English captions (WeryAI). Use for dataviz Shorts, macro explainers, or ticker TikToks. Use when the user wants one metric to explain a trend. SEO: one number explains video; data hook video.

One number explains everything (hero digit → ramp → meaning)

Template (assume duration 10 unless scaled): 0–3s this number explains it all (user names which metric conceptually—caption stays short); 3–8s number grows / graph ramps—motion must not stop (tickers, bars, globe wireframe); 8–10s one conclusion line (user-themed). English subtitles with exact windows. Default duration is 10 when unspecified.

Dependencies: WERYAI_API_KEY + Node.js 18+. scripts/video_gen.js + WERYAI_VIDEO_API.md. No other Cursor skills required.

Prerequisites

• WERYAI_API_KEY must be set; Node 18+. Prefer public https image URLs; if the assembled scripts/video_gen.js supports local file paths, review/verify the script and explicitly consent before local read-and-upload to WeryAI.
• Non-empty model.

Security, secrets, and API hosts

• WERYAI_API_KEY: Secret; never commit.
• API hosts fixed in video_gen.js.
• Local image handling disclosure: Prefer public https image URLs. If the assembled scripts/video_gen.js supports local file paths, it may read a local image and upload it to WeryAI to obtain a public URL; require review / verification and explicit consent before using that path.
• Higher assurance: Prefer a short-lived or isolated environment; review scripts/video_gen.js before production use. Verify whether the runtime can read local image files and upload them to WeryAI, and obtain explicit consent before using that path.

Prompt expansion (mandatory)

• Duration: Default 10; 5 or 15 when allowed and requested.
• Timeline scaling: Rescale 0–3 / 3–8 / 8–10 proportionally; keep hook → ramp → meaning order.

Locked rhythm (example for duration 10):

• 0.0–3.0s — Hook: e.g. THIS NUMBER EXPLAINS EVERYTHING (or embed the name of the metric in ≤6 words).
• 3.0–8.0s — Ramp beat—split into two on-screen lines if needed (3–5.5 WATCH IT CLIMB, 5.5–8.0 FASTER THAN YOU THINK)—customize to user tone.
• 8.0–10.0s — Meaning: e.g. HERE’S WHAT IT MEANS (user supplies specific kicker in brief—you compress to ≤6 words).

Visuals: Giant numeral, neon graph, motion blur streaks, particles; refresh chart at least every ~1s.

Typography: Huge readable words + numeric; outline; lower third for sentences, center for hero digit moments if described.

Negatives (Kling): garbled digits, illegible captions, watermark.

Confirmation: Full prompt.

Niche checklist

• If real stats matter to the user, they must approve final wording—you still compress for on-screen limits.
• Avoid fake precision—prefer “illustrative counter” language in prompt if not citing sources.

Workflow

1. Text / image / multi-image (SEEDANCE_2_0, ≤3).
2. Collect which metric / metaphor.
3. Expand → validate → confirm → wait.
4. [Video](url).

CLI reference

node scripts/video_gen.js wait --json '{"model":"KLING_V3_0_PRO","prompt":"…","duration":10,"aspect_ratio":"9:16","generate_audio":true,"negative_prompt":"illegible text, garbled numbers, watermark"}'
node scripts/video_gen.js wait --json '{"model":"SEEDANCE_2_0","prompt":"…","duration":10,"aspect_ratio":"9:16","resolution":"720p","generate_audio":true}'

Full reference: WERYAI_VIDEO_API.md.

Definition of done

Video or error; hook / ramp / meaning subtitle structure explicit in prompt with second ranges scaled to duration (or user-approved subdivision).

Boundaries (out of scope)

• Not a data journalism vetting pipeline.
• resources/WERYAI_VIDEO_API.md for CLI; no negative_prompt on Seedance.
• Multi-image only SEEDANCE_2_0, max 3.

Example prompts

• Metric: compound growth—counter ramp, meaning about time
• Metric: attention minutes per day—punchy closer
• Chart image URL → animate growth with same windows
• Inflation or CPI vibe—counter climbs, meaning line about purchasing power

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Model and API constraints (frozen for this skill)

Text-to-video

model_key	durations	aspect_ratios	resolutions	audio	negative_prompt	prompt limit
KLING_V3_0_PRO	5, 10, 15	9:16, 1:1, 16:9	(omit)	yes	yes	2000
KLING_V3_0_STA	5, 10, 15	9:16, 1:1, 16:9	(omit)	yes	yes	2000
SEEDANCE_2_0	5, 10, 15	9:16, 1:1, 16:9	480p, 720p	yes	no	2000

Image-to-video

model_key	durations	aspect_ratios	resolutions	audio	negative_prompt	image slots
KLING_V3_0_PRO	5, 10, 15	9:16, 16:9, 1:1	(omit)	yes	yes	single image
KLING_V3_0_STA	5, 10, 15	9:16, 16:9, 1:1	(omit)	yes	yes	single image
SEEDANCE_2_0	5, 10, 15	9:16, 1:1, 16:9	480p, 720p	yes	no	up to 3 images

Recommended models

Tier	model_key	Default duration
⭐ Best	KLING_V3_0_PRO	10
👍 Good	KLING_V3_0_STA	10
⚡ Fast	SEEDANCE_2_0	10 (resolution: 720p)

Default parameters

Field	Value
aspect_ratio	9:16
duration	10
generate_audio	true
resolution	720p (Seedance)
negative_prompt	Kling: illegible text, garbled numbers, watermark

Text-to-video (primary)

User gives topic for the number → you craft three beats → confirm.

Image-to-video (optional)

Static chart → ramp animation + captions.

Tips

• Sound: describe tick + whoosh—helps perceived pacing.
• Translate user Chinese brief to English on-screen lines unless specified.

Packaged as one-number-explains-video-gen.