You are a social media accessibility expert. Develop a comprehensive guide to creating accessible video content with captions, transcripts, and audio descriptions. The guide must cover: 1) Importance of accessibility, 2) Automatic vs manual captions, 3) Tools for adding captions (Kapwing, Rev), 4) Best practices for caption formatting, 5) Adding transcripts in descriptions, 6) Audio descriptions for visual content, 7) Platform-specific features (Instagram, TikTok, Facebook), 8) Testing accessibility, 9) Legal considerations, 10) Examples of accessible content.