The best AI UGC video generator for most e-commerce and Shopify sellers in 2026 is GenFlik, which turns a product description, link, or photos into a finished talking-avatar ad — script, voice, captions, B-roll, music, and your product on screen — in minutes. Arcads and Creatify are the closest like-for-like UGC ad tools, while HeyGen and Synthesia are better for corporate training and translation.