AI Birthday Video Generator turns a single selfie into a 12-second vertical birthday video of the celebrating person at their own party. Choose a ready scene, such as popping champagne on a park bench at night, blowing out a Scorpio cake, or holding a crown cake up to a car window, then personalize it: swap the star sign for their own, change the outfit color, or set the closing words to their name and age. The result is a new moving video with party sound, not a slideshow over music, rendered at 720p on Seedance 2 Mini and downloadable for the morning message, the family group chat, or a social post. Pricing is pay per clip with no subscription: one video costs $9.99, three cost $19.99, and five cost $29.99, and unused clips stay on the balance without expiring. It suits anyone who wants a personal birthday surprise for a friend, partner, or parent, from one camera-roll photo.