Why it worked
The video provides clear, educational content on a common topic of confusion, delivered by a credible source (biomedical engineer). The creator also subtly integrates her own products as a solution, making the content both informative and subtly promotional.
Summary
A biomedical engineer explains the difference between the vulva and vagina, emphasizing that the vagina is self-cleaning due to its microbiome, while the vulva, being external skin, requires gentle cleansing. She then introduces her own products, probiotics for internal vaginal health and a gentle cleanser for external vulvar care.