- Add VTPlayer interface with microsecond precision seeking
- Implement MPV controller for frame-accurate playback
- Add VLC backend support for cross-platform compatibility
- Create FFplay wrapper to bridge existing controller
- Add factory pattern for automatic backend selection
- Implement Fyne UI wrapper with real-time controls
- Add frame extraction capabilities for preview system
- Support preview mode for trim/upscale/filter modules
- Include working demo and implementation documentation
