真人感，
从可信的细节开始。

[Character Lock — CREATOR_NAME]
Use [CHARACTER_REFERENCE] as the identity authority.
[Adult age range, body proportions, distinct facial features.]
[Hair, eyewear if present, clothing, accessories.]
Preserve the same facial structure and body proportions throughout.
[Allowed posture and simple gestures.]
The person is [a demonstrator / the actual authorized creator]; do not invent
customer experiences, professional credentials, affiliations or results.

[Product Lock]
Use [PRODUCT_REFERENCE / SKU] for product geometry, color, material and packaging.
Keep the real label and logo exactly as shown; do not invent lettering or claims.
Demonstrate only [VERIFIED PHYSICAL ACTION / OBSERVABLE FEATURE].

[Setting Lock]
Use [ROOM_REFERENCE]. [Room layout, camera direction, product location.]
[Window/light position, practical light temperature and soft/hard quality.]
[Two or three relevant objects with ordinary traces of use and fixed positions.]
Keep these spatial relationships consistent throughout.

[Voice Lock]
Language: [TARGET LANGUAGE]. Accent: [TARGET MARKET ACCENT].
Voice: [Age range, timbre], relaxed everyday speech at [TESTED PACE].
Speak only the quoted dialogue. No narration from a second speaker.
Mouth movement follows the exact dialogue timing in [TARGET LANGUAGE];
the mouth is closed and still during silent beats.
[If verified and needed: Brand NAME is pronounced PRONUNCIATION.]

[Capture and texture]
Vertical 9:16, casual smartphone home-video feel.
Handheld with subtle natural movement, slight motion blur during movement,
composition slightly off-center. Keep the product readable at the demonstration.
[Actual light direction, temperature and softness], with natural falloff.
Skin shows natural texture with pores and subtle imperfections,
natural local differences in skin tone, not over-smoothed plastic.
Match skin exposure and focus softness to the room and the reference.
Hands have natural anatomy with five fingers and correct proportions.
Eyes remain stable and focused on [ONE GAZE TARGET], without flickering or jitter.

[Timeline — 20-second target; adapt to the verified generation limit]
0–2s | HOOK
[Start mid-action: a simple real interaction with the product.]
Dialogue: "[Short market-appropriate hook, with no unsupported numbers.]"
Camera: [Fixed casual angle / small motivated movement.]

2–7s | USE CONTEXT
[One concrete situation showing why the feature matters.]
Dialogue: "[Natural short sentence about the situation.]"
Camera: [For example: subtle 1.05x push-in from 2s to 5s.]

7–17s | DEMONSTRATION
[Grip the product, place it down or push it closer; show one verified feature.]
Dialogue: "[A factual observation supported by the SKU.]"
Keep hand–product contact physically coherent. Preserve the exact packaging.
[Leave a short silent beat to see the action.]

17–20s | NEXT STEP
[Finish the action naturally; retain product visibility.]
Dialogue: "[Actual purchase path or neutral next step.]"

[Quality directives]
Maintain the locked person, product, room and light-source relationships.
Hands have natural anatomy with five fingers and correct proportions.
Skin shows natural texture with pores and subtle imperfections.
Eyes remain stable and focused; synchronize the mouth to the exact dialogue.
Documentary realism throughout, not an AI-art aesthetic, 3D render or illustration.
Use ordinary practical lighting and casual framing, not polished studio staging.
No newly generated captions, floating words, fake background lettering,
unrelated logos, UI overlays, numbers or symbols.
Preserve the authentic text and branding already present on the product reference.
Unmarked background surfaces show their natural material texture.
Keep intentional subtitles out of the generated footage; add them as a separate
post-production layer only if requested.