Video Resizer
Resize videos for the platform they actually need to fit.
Problem it solves
One video rarely fits every platform. Teams need the same source adapted for vertical short-form, square ads, storefront slots, review links, and lightweight previews. This skill turns one source into correctly sized outputs without careless stretching or amateur-looking results.
Use when
- A video needs to fit TikTok, Reels, Shorts, Shopify, Amazon, PDP, ads, or internal review formats
- A user needs 9:16, 1:1, 4:5, 16:9, or platform-specific dimensions
- A team wants quick resized variants from one source
Do not use when
- The user needs intelligent reframing of moving subjects beyond simple resize/crop strategy
- The source composition is fundamentally wrong and needs manual editing
Inputs
- Source video file
- Target aspect ratio or platform
- Whether to pad, crop, or scale to fit
- Optional output resolution and file size constraints
- Priority area to preserve: face, product, subtitles, or full frame
Workflow
- Clarify the target platform and dimension requirement.
- Decide whether scale, pad, or crop is the right strategy.
- Preserve the most important visual area.
- Export one or multiple platform-ready sizes.
- Explain any framing tradeoffs.
Output
Return:
- Chosen resize strategy
- Output dimensions
- Framing notes
- Compatibility notes
- Optional additional recommended sizes
Quality bar
- Never stretch people or products unnaturally
- Preserve readable text whenever possible
- Prefer platform-safe dimensions over custom vanity sizes
- Make crop vs pad tradeoffs obvious
Resource
See references/output-template.md.