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Animation best practices across easing, timing, properties, transforms, interactions, and accessibility for web interfaces. \n \n 43 rules organized by priority across 7 categories, from critical easing and timing decisions to medium-priority accessibility and polish \n Covers easing curves (ease-out default, custom cubic-bezier, spring animations), timing windows (300ms max for UI, 500ms for drawers), and property selection (transform and opacity only) \n Includes interaction patterns for gestu

Use this skills whenever you are dealing with Remotion code to obtain the domain-specific knowledge.

Download videos from YouTube and other platforms in multiple formats and quality levels. \n \n Supports quality selection from 480p to 4K, with format options including MP4, WebM, and audio-only MP3 \n Handles single videos, playlists, and batch downloads of multiple videos in one command \n Preserves metadata including title, description, and thumbnail with organized file naming \n Respects copyright and fair use; intended for personal, educational, and archival purposes only \n

Select and implement the optimal Flutter animation strategy for your UI requirement. \n \n Includes a decision tree to choose between implicit animations, explicit tweens, physics-based motion, hero transitions, staggered sequences, and page route transitions \n Provides complete code examples for each animation type, from simple AnimatedContainer to complex staggered multi-tween setups \n Enforces strict memory management with mandatory AnimationController disposal and performance best practice

Programmable video production with Remotion, scene planning, asset orchestration, and automated rendering for brand-consistent content. \n \n Guides video creation through five structured steps: spec definition, scene outlining, asset preparation, React composition implementation, and QA rendering \n Supports multiple aspect ratios (16:9, 1:1, 9:16) and tones (fast, calm, cinematic) with integrated narration, visuals, and animations \n Includes scene templates, asset checklists, and Remotion com

通过视觉/视频大模型分析视频内容，支持本地视频文件和互联网视频。

Help YouTubers/UP主 prepare video content: write structured scripts (口播稿), blog posts, and platform-specific publishing materials.

Understand video content locally using ffmpeg for frame extraction and Whisper for transcription. Fully offline, no API keys required.

Apply Disney's 12 principles to scroll-triggered motion.

Translate natural language video editing requests into ready-to-run FFmpeg commands. \n \n Supports 15+ operations: cut/trim, format conversion, aspect ratio changes, resolution scaling, compression, audio extraction, speed adjustment, GIF creation, rotation, watermarking, subtitle burning, and video merging \n Handles common aspect ratios (16:9, 4:3, 1:1, 9:16, 21:9) with automatic letterboxing and standard resolutions (4K, 1080p, 720p, 480p, 360p) \n Includes time format flexibility (HH:MM:SS,