yt-dlp
Feature-rich video downloader — downloads video and audio from 1000+ websites including YouTube, Vimeo, Twitter, TikTok. yt-dlp features: Python API (yt_dlp.YoutubeDL context manager), format selection (bestvideo+bestaudio), audio extraction (postprocessors FFmpegExtractAudio), metadata extraction (extract_info()), subtitle download, playlist support, rate limiting (ratelimit), cookies support, proxy, SponsorBlock integration, thumbnail download, chapter markers, and --no-download for metadata-only. Fork of youtube-dl with faster development. CLI tool with Python API for agent media processing pipelines.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Browser cookies passed to yt-dlp contain authentication tokens — handle cookie files as sensitive credentials. Downloaded content may contain malware in embedded metadata; validate before processing. Respect copyright law and platform Terms of Service. Agent automation must implement rate limiting to avoid ToS violations.
⚡ Reliability
Best When
Downloading media from 1000+ websites for agent processing pipelines (transcription, analysis, archival) where manual download isn't feasible — yt-dlp handles format selection, metadata, and post-processing in a single Python API call.
Avoid When
You need real-time streaming, YouTube Data API access (for metadata, not download), or are downloading without permission.
Use Cases
- • Agent audio extraction — ydl_opts = {'format': 'bestaudio/best', 'postprocessors': [{'key': 'FFmpegExtractAudio', 'preferredcodec': 'mp3'}], 'outtmpl': '%(title)s.mp3'}; with yt_dlp.YoutubeDL(ydl_opts) as ydl: ydl.download(['https://youtube.com/watch?v=...']) — agent downloads YouTube video as MP3 for transcription or music analysis
- • Agent metadata extraction — with yt_dlp.YoutubeDL({'quiet': True}) as ydl: info = ydl.extract_info(url, download=False) — extract title, duration, description, thumbnail URL without downloading; agent builds video database from YouTube channel without storage overhead
- • Agent transcript download — ydl_opts = {'writesubtitles': True, 'writeautomaticsub': True, 'subtitleslangs': ['en'], 'skip_download': True}; agent downloads YouTube auto-generated captions for text analysis; subtitle files in .vtt or .srt format
- • Agent playlist download — ydl_opts = {'format': 'bestvideo[ext=mp4]+bestaudio[ext=m4a]', 'outtmpl': '%(playlist_index)s-%(title)s.%(ext)s'}; with yt_dlp.YoutubeDL(ydl_opts) as ydl: ydl.download(['https://youtube.com/playlist?list=...']) — download entire playlist; agent ingests lecture series or tutorial playlists
- • Agent format selection — 'format': 'bestvideo[height<=720]+bestaudio/best[height<=720]' — download 720p max; agent saves bandwidth and storage; format selector language allows precise quality/codec control
Not For
- • Downloading copyrighted content without permission — yt-dlp is a tool; usage must comply with platform ToS and copyright law; agent automation must respect content licensing
- • Real-time streaming — yt-dlp downloads complete files; for live stream recording use --live-from-start or streaming tools
- • High-volume commercial scraping — YouTube ToS prohibits automated bulk downloading; for commercial video data use YouTube Data API
Interface
Authentication
No auth for public content. Age-restricted or members-only content requires browser cookies (--cookies-from-browser or --cookies file). Platform authentication via cookies passed to yt-dlp.
Pricing
yt-dlp is Unlicense licensed (public domain). Free for all use.
Agent Metadata
Known Gotchas
- ⚠ ffmpeg required for format merging and audio extraction — yt-dlp downloads best video and audio separately then merges with ffmpeg; without ffmpeg installed, format 'bestvideo+bestaudio' fails; agent containers must install ffmpeg alongside yt-dlp: apt-get install ffmpeg; verify with ydl.params.get('ffmpeg_location')
- ⚠ YouTube frequently breaks yt-dlp — YouTube changes internal API; yt-dlp releases updates within hours but agent code must update frequently; pin to latest version not a fixed old version; agent CI should check yt-dlp version weekly; add try/except DownloadError with fallback
- ⚠ outtmpl template variables must match info_dict — %(title)s, %(id)s, %(ext)s are standard; %(playlist_title)s only available for playlist downloads; agent code using playlist variables on single video raises KeyError; use %(playlist_title|None)s with default for safety
- ⚠ extract_info() returns flat_playlist by default — ydl.extract_info(playlist_url) returns playlist info with entries list; extract_info with process=False returns unprocessed data; agent processing individual videos must iterate info['entries']; entries may be lazy-loaded generators not lists
- ⚠ Rate limiting required for polite agent automation — yt-dlp without rate limiting downloads at maximum speed; YouTube may temporarily block IP; agent pipelines must set 'ratelimit': 500000 (500KB/s) and 'sleep_interval': 2 for respectful downloading; aggressive downloading triggers bot detection
- ⚠ Cookies required for age-restricted content — yt-dlp without auth skips age-restricted videos silently or errors; agent pipelines processing YouTube channels must handle missing cookies gracefully; extract_info(download=False) with 'ignoreerrors': True continues playlist despite access errors
Alternatives
Full Evaluation Report
Comprehensive deep-dive: security analysis, reliability audit, agent experience review, cost modeling, competitive positioning, and improvement roadmap for yt-dlp.
AI-powered analysis · PDF + markdown · Delivered within 30 minutes
Package Brief
Quick verdict, integration guide, cost projections, gotchas with workarounds, and alternatives comparison.
Delivered within 10 minutes
Score Monitoring
Get alerted when this package's AF, security, or reliability scores change significantly. Stay ahead of regressions.
Continuous monitoring
Scores are editorial opinions as of 2026-03-06.