Add comprehensive WebM to MP4 conversion documentation to help users convert
high-quality YouTube downloads to more widely compatible MP4 format.
Changes:
- Add "Convert WebM to MP4" section to Common Tasks with ffmpeg workflow
- Include detailed parameter explanations (H.264, AAC, CRF, preset)
- Add conversion use case to "When to Use This Skill" section
- Document encoding speed expectations (~6x on modern hardware)
- Maintain imperative form throughout new content
The workflow guides users through:
1. Installing ffmpeg if needed
2. Converting WebM (VP9) to MP4 (H.264/AAC) with optimal settings
3. Understanding quality/speed tradeoffs
This addresses the common need to convert high-quality YouTube downloads
(which use WebM/VP9 by default) to MP4 format for better device compatibility.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
