The Vanish Airbrush Concealer in Sepia color by Hourglass is highly praised by Vanessa in her video review. She demonstrates the concealer's full coverage and brightening effect, showcasing the before and after results. Vanessa mentions that only a small amount of product is needed for a noticeable difference. She also notes that the concealer works well on its own, without the need for additional powder or color corrector. Overall, Vanessa declares this concealer as her new favorite, indicating its effectiveness and desirability. However, no potential drawbacks are mentioned in the review.