media-downloader — independently scanned and version-tracked by SaferSkills.
SaferSkills independently audited media-downloader (Agent Skill) and scored it 100/100 (green). The audit ran 55 deterministic rules across Security, Supply Chain, Maintenance, Transparency, and Community; it found 0 high-severity and 0 lower-severity findings. The full rule-by-rule trace and per-finding evidence are below. Free, methodology-open.
Findings & checks · 0 flagged
Every scanned point with the score it earned and what moved between them.
First recorded scan — no prior version to compare against.
The primary manifest — the file an agent reads to learn what this artifact does.
Download video/audio from 1500+ websites using yt-dlp. Supports format selection, subtitles, playlists, and custom output naming.
# Basic download (best quality)
yt-dlp "URL"
# Specific resolution
yt-dlp -f "bestvideo[height<=1080]+bestaudio/best[height<=1080]" "URL"
# With subtitles
yt-dlp --write-subs --sub-langs "en,zh" "URL"
# Audio only
yt-dlp -f "bestaudio" "URL"| Request | Command |
|---|---|
| Best quality | -f "bestvideo+bestaudio/best" |
| 4K | -f "bestvideo[height<=2160]+bestaudio/best" |
| 1080p | -f "bestvideo[height<=1080]+bestaudio/best" |
| 720p | -f "bestvideo[height<=720]+bestaudio/best" |
| 480p | -f "bestvideo[height<=480]+bestaudio/best" |
yt-dlp -F "URL" # Show all formats with codes# Prefer MP4 container
yt-dlp -f "bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best" "URL"
# Specific format code (from -F output)
yt-dlp -f 137+140 "URL"
# Merge to specific container
yt-dlp --merge-output-format mkv "URL"# Manual subtitles (human-created)
yt-dlp --write-subs --sub-langs "en,zh,ja" "URL"
# Auto-generated subtitles
yt-dlp --write-auto-subs --sub-langs "en" "URL"
# Both manual and auto
yt-dlp --write-subs --write-auto-subs --sub-langs "en,zh" "URL"
# Embed subtitles in video (MP4/MKV/WebM)
yt-dlp --write-subs --embed-subs "URL"yt-dlp --list-subs "URL"# Convert to SRT
yt-dlp --write-subs --sub-format srt "URL"
# Available: srt, ass, vtt, lrc| Variable | Description | Example |
|---|---|---|
%(title)s | Video title | My Video |
%(id)s | Video ID | dQw4w9WgXcQ |
%(ext)s | File extension | mp4 |
%(upload_date)s | Upload date | 20231215 |
%(uploader)s | Channel name | Rick Astley |
%(playlist)s | Playlist name | Best Songs |
%(playlist_index)s | Position in playlist | 01 |
%(resolution)s | Video resolution | 1920x1080 |
# Default: title + extension
yt-dlp -o "%(title)s.%(ext)s" "URL"
# Date prefix
yt-dlp -o "%(upload_date)s - %(title)s.%(ext)s" "URL"
# Organized by uploader
yt-dlp -o "%(uploader)s/%(title)s.%(ext)s" "URL"
# Playlist with numbering
yt-dlp -o "%(playlist)s/%(playlist_index)02d - %(title)s.%(ext)s" "URL"
# Sanitize title (remove special chars)
yt-dlp -o "%(title).100B.%(ext)s" "URL" # Limit to 100 bytes# Download entire playlist
yt-dlp "PLAYLIST_URL"
# Only video (not playlist)
yt-dlp --no-playlist "URL"
# Specific items (1-indexed)
yt-dlp -I 1:5 "PLAYLIST_URL" # First 5
yt-dlp -I 1,3,5 "PLAYLIST_URL" # Items 1, 3, 5
yt-dlp -I -3: "PLAYLIST_URL" # Last 3
# Skip already downloaded
yt-dlp --download-archive downloaded.txt "PLAYLIST_URL"--cookies-from-browser for premium content--write-subs --sub-langs "zh-Hans"--cookies-from-browser for private content--cookies-from-browser firefox or --cookies cookies.txt# Browser cookies (recommended)
yt-dlp --cookies-from-browser firefox "URL"
yt-dlp --cookies-from-browser chrome "URL"
# Cookie file
yt-dlp --cookies cookies.txt "URL"
# Username/password (limited support)
yt-dlp -u USERNAME -p PASSWORD "URL"| Issue | Solution |
|---|---|
| "Video unavailable" | Try --cookies-from-browser |
| Slow download | Add --concurrent-fragments 4 |
| Format merge fails | Install ffmpeg |
| Geo-blocked | Use --geo-bypass or proxy |
yt-dlp -U # Update to latest stableDownload YouTube video in 1080p with Chinese subtitles:
yt-dlp -f "bestvideo[height<=1080]+bestaudio/best" \
--write-subs --sub-langs "zh" \
-o "%(title)s.%(ext)s" \
"https://youtube.com/watch?v=..."Download TikTok video:
yt-dlp -o "%(uploader)s - %(title)s.%(ext)s" \
"https://tiktok.com/@user/video/..."Download Bilibili playlist:
yt-dlp --cookies-from-browser chrome \
-o "%(playlist)s/%(playlist_index)02d - %(title)s.%(ext)s" \
"https://bilibili.com/video/BV..."Download Twitter video:
yt-dlp --cookies-from-browser firefox \
"https://twitter.com/user/status/..."~30 seconds. Free. No account. Every finding cites a rule and a line of evidence.