Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add feiskyer/video-skills --skill download-videogit clone --depth 1 https://github.com/feiskyer/video-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/feiskyer/video-skills/download-video)<a href="https://agentmods.dev/skills/feiskyer/video-skills/download-video"><img src="https://agentmods.dev/badge/skills/feiskyer/video-skills/download-video/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/feiskyer/video-skills/download-video"><img src="https://agentmods.dev/badge/skills/feiskyer/video-skills/download-video.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00112 | $0.00645 |
| Opus 5 | $0.00056 | $0.00322 |
| Sonnet 5 | $0.00022 | $0.00129 |
| Haiku 4.5 | $0.00011 | $0.00064 |
Grade A, and why
download-video scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Download Video
Download videos from YouTube, Bilibili, Twitter/X, TikTok, and 1000+ other sites using yt-dlp.
Step 1: Check prerequisites
which yt-dlp && yt-dlp --version
which ffmpeg
If yt-dlp is missing, install it:
# macOS
brew install yt-dlp ffmpeg
# Cross-platform
pip install yt-dlp
Step 2: Download
Use the bundled script — it wraps yt-dlp with sensible defaults and clear error messages.
python3 scripts/download.py "VIDEO_URL"
Default output: ~/Downloads/Videos/
Common options
python3 scripts/download.py "URL" -f 1080 # Max 1080p
python3 scripts/download.py "URL" -a # Audio only (MP3)
python3 scripts/download.py "URL" -F # List formats
python3 scripts/download.py "URL" --subs # With subtitles
python3 scripts/download.py "URL" -o ~/Desktop # Custom output dir
python3 scripts/download.py "URL" --cookies chrome # Use browser cookies
Direct yt-dlp commands
For cases the script doesn't cover, use yt-dlp directly:
# Download playlist
yt-dlp -P ~/Downloads/Videos "PLAYLIST_URL"
# Custom filename template
yt-dlp -o "%(uploader)s - %(title)s.%(ext)s" "VIDEO_URL"
# Download with subtitles in specific languages
yt-dlp --write-subs --sub-lang zh,en -P ~/Downloads/Videos "VIDEO_URL"
Troubleshooting
Most download failures fall into these categories:
| Symptom | Fix |
|---|---|
| "Sign in required" or age-restricted | Add --cookies chrome to use browser session |
| Only low quality available | Update yt-dlp (brew upgrade yt-dlp), then try with --cookies chrome |
| Slow downloads | Try --concurrent-fragments 3 or --downloader aria2c |
| Network errors (behind firewall) | Use --proxy socks5://127.0.0.1:1080 or set ALL_PROXY env var |
For platform-specific details (YouTube PO tokens, Bilibili series, TikTok watermark removal, etc.), see references/platform-tips.md.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 75 lines · 112 tokens per session scan A dea2c689c762
download-video is a skill published in the GitHub repository feiskyer/video-skills (14 stars, last pushed 4mo ago), licensed MIT. It adds 112 tokens to every session and 645 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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