Precise video description

Use this skill when an existing video must be represented faithfully in production language. The output should let another agent or reviewer reconstruct what is visibly present, where it is, how it changes, and how the camera records it without inventing intent or atmosphere.

This skill describes observed media. It does not direct a future shot, infer a filmmaker's psychology, write accessibility captions, or execute a provider API.

Evidence stance

• Observed fact: directly visible in reviewed frames or playback.
• Measured fact: derived from file metadata or a reproducible tool, with method and tolerance.
• Inference: plausible but not visually established; label it or omit it.
• Production heuristic: a practical description rule, not a claim about the source.

The five-aspect structure below is informed by Lin et al.'s CHAI video-language specification and professional cinematography practice. Sources were checked 2026-07-14. CHAI's complete CameraBench-Pro primitive catalog was not fully available under a stable public package during authoring; do not reconstruct or copy an unavailable taxonomy from screenshots.

Define the description contract

Before watching in detail, record: