### PR [#2073](https://github.com/danielmiessler/Fabric/pull/2073) by [sathvikc](https://github.com/sathvikc) and [ksylvan](https://github.com/ksylvan): feat(youtube): Implement visual text extraction via FFmpeg and OCR

- Implemented FFmpeg and Tesseract-based visual text extraction from YouTube videos, enabling OCR on video frames.
- Added configurable CLI flags for visual extraction parameters, giving users fine-grained control over the feature.
- Fixed support for multi-line `yt-dlp` outputs and updated syntax compatibility with modern FFmpeg versions.
- Refactored OCR processing to use bounded concurrency, context timeouts, and hardened CLI argument handling for improved stability and security.
- Resolved multiple reliability issues including Tesseract CLI argument handling, racy error handling, and timestamp overflow bugs.
