21st.dev (YC) — SaaS Promo Video for Meta Ads Campaign

by Ruslan Terlovoi

We created a 15–20 second SaaS promo video for 21st.dev, combining custom graphic design, dynamic UI animation, and high-energy motion graphics. The video was designed for Meta Ads and influencer integrations, emphasizing the visual difference between a generic AI-generated website and a refined, design-led result created with 21st.dev. Through fast-paced transitions, stylized interface animation, VFX, and rhythmic editing, the video captures attention from the opening seconds and maintains engagement through to the final frame. Every scene was carefully crafted to create momentum and visual clarity while keeping the product transformation easy to follow. The project highlights YoungYosha’s approach to SaaS product communication, where strong design, pacing, and sound work together to turn a short product message into an engaging visual experience.