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 tubecreate/tubecli --skill video_downloadergit clone --depth 1 https://github.com/tubecreate/tubecliWrote 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/tubecreate/tubecli/video_downloader)<a href="https://agentmods.dev/skills/tubecreate/tubecli/video_downloader"><img src="https://agentmods.dev/badge/skills/tubecreate/tubecli/video_downloader/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/tubecreate/tubecli/video_downloader"><img src="https://agentmods.dev/badge/skills/tubecreate/tubecli/video_downloader.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Tool Misuse · line 57 Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
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 | $0.00021 | $0.00428 |
| Opus 5.5 | $0.00008 | $0.00171 |
| Sonnet 5.5 | $0.00004 | $0.00086 |
| Haiku 4.5 | $0.00002 | $0.00043 |
Grade A, and why
Video Downloader (yt-dlp) 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 1mo 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.
What it actually says
Video Downloader Skill
This extension provides video downloading capabilities via yt-dlp.
Available API Endpoints
Check Status
GET /api/v1/ytdl/status
Returns whether yt-dlp is installed and its version.
Get Video Info
POST /api/v1/ytdl/info
{"url": "https://www.youtube.com/watch?v=VIDEO_ID"}
Returns video metadata (title, duration, uploader, thumbnails) without downloading.
Download Video
POST /api/v1/ytdl/download
{
"url": "https://www.youtube.com/watch?v=VIDEO_ID",
"format": "mp4",
"quality": "720p",
"title": "my_video"
}
Downloads video to data/ytdl_downloads/. Supports:
- format:
mp4,mp3,webm - quality:
360p,480p,720p,1080p,best
Search Videos
POST /api/v1/ytdl/search
{
"query": "python tutorial",
"platform": "youtube",
"limit": 10
}
Search for videos on YouTube or SoundCloud.
List Downloads
GET /api/v1/ytdl/downloads
Delete Download
DELETE /api/v1/ytdl/downloads/{filename}
Workflow Node
Use the 📹 Video Download node in workflows:
- Inputs:
url(required),format,quality - Outputs:
file_path,filename,status
Supported Platforms
YouTube, TikTok, Instagram, Twitter/X, Facebook, Twitch, Bilibili, SoundCloud, Vimeo, Dailymotion, and 50+ more platforms supported by yt-dlp.
What ships with it
9 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.
- 1mo ago First seen · 69 lines · 21 tokens per session scan A fc1362a011ce
Video Downloader (yt-dlp) is a skill published in the GitHub repository tubecreate/tubecli (174 stars, last pushed 2d ago), licensed MIT. It adds 21 tokens to every session and 428 once invoked, about $0.0001 per session on Opus 5.5. 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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