I tested every free AI video generator in 2025 and ranked what's actually good, with side-by-side comparisons, real prompts and settings, and clear use-case picks. All tools offer ongoing free access or free credits so you can test with no credit card required. What You'll Learn: - Best free AI video generator by task – ads, shorts, VFX, stylized edits, explainers - Exact prompts and settings to replicate my results - Free tier limits – resolution, duration, watermarks, monthly credits - Simple decision guide to choose the right tool fast - How to unify AI clips for a professional, cohesive look Tools Covered: - Sora AI – Text-to-video realism for concept shots & storyboarding - Google Veo 3.1 – Text-to-video with integrated sound/voice (up to 1 min) - Kling AI – Cinematic visuals, depth of field, motion detail - Runway Gen-3 Alpha – Full AI editing suite: generation, inpainting, bg replacement - Magic Hour – Relight, restyle, color-grade AI clips for cohesive cinematic look → https:...