VideoObject メタデータチェックリスト

# VideoObject Metadata Checklist

Video: missing
Upload date: missing
Duration: missing
Score: 0/100 (risky)

## Checks
- [ ] name: Add a clear video title.
- [ ] description: Add at least 80 characters of video description.
- [ ] thumbnail: Add a public HTTP or HTTPS thumbnail URL.
- [ ] uploadDate: Add a valid upload date.
- [ ] duration: Add video duration in minutes or seconds.
- [ ] videoUrl: Add a public content URL or embed URL.
- [ ] pageUrl: Add the canonical page URL that hosts this video.
- [ ] publisher: Add publisher name and logo URL.

## Issues
- danger: Add a clear video title.
- warning: Add at least 80 characters of video description.
- danger: Add a public HTTP or HTTPS thumbnail URL.
- danger: Add a valid upload date.
- danger: Add video duration in minutes or seconds.
- danger: Add a public content URL or embed URL.
- warning: Add the canonical page URL that hosts this video.
- warning: Add publisher name and logo URL.