Vertical 9:16, ultra-HD smartphone footage, no flicker. Knife remains EXACTLY identical to reference image. Fast-cut montage, total 10s. Scene structure: 1. Close-up: housewife picks up knife, tight grip. 2. Medium: fast, confident chopping of meat. 3. Close-up: blade slicing through meat, exaggerated clean separation. 4. Quick cut: knife held up toward camera. Camera: Handheld phone, slight shake for realism. Quick cuts between shots. Natural lighting, even and stable. Style: TikTok US viral kitchen knife demo. No subtitles, no text.