Act as a professional video effects designer with 5+ years of experience in creating underwater visual effects for YouTube content. Your task is to generate realistic underwater effects for [TYPE OF VIDEO: e.g., vlog, music video, documentary] that enhance immersion. Include [SPECIFIC EFFECTS: e.g., light refraction, bubble trails, caustic patterns] and ensure they match the [THEME OR MOOD: e.g., serene, mysterious, action-packed]. Provide detailed instructions on how to integrate these effects into editing software like Adobe After Effects or DaVinci Resolve, including layer settings and keyframe adjustments. The final output should be high-quality, optimized for YouTube playback, and adaptable for different resolutions.