时长与镜头：三段是"滴落 → 延时吸收 → 结果"。延时段是重点，进度条让观众直观感到"几秒就吸收"，但视频本身只是示意，正式投放时不要配上具体秒数或功效承诺。

怎么填变量：[保湿精华液] 换成"[清爽防晒乳]""[美白面霜]"，液体颜色跟着改成乳白、浅粉；"肤色表面"想更直观，可以写"手背的皮肤"，但手背特写更容易出现纹理怪异，建议先用光滑表面。

常见失败与调整：

• 进度条变成文字或数字乱码：写"一条没有任何文字和数字的细线进度条"，或干脆删掉、后期加。
• 液体拉丝、滴不下来：加"液滴干脆地断开，一次落下"。
• 画面不是方形：在入口里手动选比例，不要只靠提示词。

改编自 LichAmnesia/awesome-ad-video-prompts（awesome-ad-video-prompts contributors），许可证 CC BY 4.0。

英文原版

Beauty-lab feature explainer for a [brand] hydrating face serum, shot like a clinical macro study. 0-2s: extreme macro on one amber droplet hanging off a glass pipette tip, soft diffused softbox light from above, a quiet airy room tone, the droplet trembling then releasing. 2-4s: the drop lands on a smooth skin-toned surface and a compressed time-lapse begins — the liquid fans out in a thin even sheet and visibly sinks downward as tiny surface micro-bubbles dissolve one by one, a slim minimalist progress bar filling along the bottom edge to mark the seconds. 4-6s: the camera lifts smoothly to a 45-degree angle revealing a dewy, fully-absorbed even finish with a single specular highlight gliding across as the surface tilts. The pipette and bottle hold identical shape, amber tint, dropper bulb, and label across every frame — no deformation, liquid stringing, smearing, ghost droplets, or warping glass. Creamy pastel grade, glassy reflections, weightless slow motion throughout.