docs: add Video & Subtitles category for VideoCaptioner

Author: liangweifeng

README.md

@@ -457,6 +457,7 @@ The catalog auto-updates whenever `registry.json` changes — new community CLIs
 | **📐 Diagramming & Visualization** | Create and manipulate diagrams, flowcharts, architecture diagrams, and visual documentation programmatically | Draw.io (diagrams.net), Mermaid, PlantUML, Excalidraw, yEd |
 | **🌐 Network & Infrastructure** | Manage network services, DNS, ad-blocking, and infrastructure through structured CLI commands | AdGuardHome |
 | **🔬 Graphics & GPU Debugging** | Analyze GPU frame captures, inspect pipeline state, export shaders, and diff rendering state | RenderDoc |
+| **🎬 Video & Subtitles** | Transcribe speech, translate subtitles, burn styled captions into video — full captioning pipeline | VideoCaptioner |
 | **✨ AI Content Generation** | Generate professional deliverables (slides, docs, diagrams, websites, research reports) through AI-powered cloud APIs | [AnyGen](https://www.anygen.io), Gamma, Beautiful.ai, Tome |
 
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