ugc-ads: handheld, phone-shot, deliberately unpolished

Turns a product and a situation into a clip that reads as something a real customer filmed on a phone — an unboxing, a first impression, a use-it-once review. Amateur texture is the deliverable, not a compromise.

This skill is a thin, scenario-specific layer over ofox-video-core. It owns the UGC prompt craft, the brief, the defaults and the pre-generation cost estimate; ofox-video-core owns talking to the Ofox API correctly and safely (the OFOX_API_KEY handling, the no-resubmit rule, error-code mapping, download/verification, and reporting the downloaded file's absolute VIDEO_PATH). Read that skill's safety contract before using this one — it is not restated here.