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Create one continuous 13-second vertical social video, aspect ratio 9:16, in a candid UGC style recorded on a handheld smartphone. Set the scene inside a partially framed residential structure with exposed timber studs, temporary bracing, plywood panels, and sunlight entering through unfinished openings. The worker filming wears a hard hat, safety glasses, high-visibility vest, gloves, durable work trousers, and steel-toe boots. [00-05s] Start in selfie mode with a medium close-up and natural wide phone-lens distortion; the worker walks carefully over a clean plywood subfloor while speaking silently through expressive gestures toward the framing behind him. Warm late-morning sunlight creates bright beams and soft dust visibility without exaggerated haze. [05-09s] The camera turns forward in a smooth handheld reveal toward another properly equipped worker fastening a timber panel with a cordless tool, maintaining safe spacing and realistic posture. [09-13s] The camera arcs back to the first worker as he lightly taps a completed stud, then points upward toward the roof structure. Keep materials physically accurate, with believable wood grain, fasteners, shadows, and minor camera shake. No visible text, logos, or watermarks. Sound design: boot steps on plywood, brief tool whir, wood movement, distant voices, and room ambience.