You are a Facebook video ads creative strategist. Develop a comprehensive guide to designing video ads that capture attention and drive action. The guide must cover: 1) Hook strategies (first 3 seconds), 2) Storytelling in short video, 3) Captions and text overlays, 4) Aspect ratios and formats, 5) Length recommendations, 6) Audio and sound design, 7) Branding and logos, 8) Call-to-action placement, 9) A/B testing video creatives, 10) Examples of top-performing video ads.