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 marchatton/agent-skills --skill video-transcript-downloadergit clone --depth 1 https://github.com/marchatton/agent-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/marchatton/agent-skills/video-transcript-downloader)<a href="https://agentmods.dev/skills/marchatton/agent-skills/video-transcript-downloader"><img src="https://agentmods.dev/badge/skills/marchatton/agent-skills/video-transcript-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/marchatton/agent-skills/video-transcript-downloader"><img src="https://agentmods.dev/badge/skills/marchatton/agent-skills/video-transcript-downloader.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 | $0.00070 | $0.00603 |
| Opus 5 | $0.00035 | $0.00302 |
| Sonnet 5 | $0.00014 | $0.00121 |
| Haiku 4.5 | $0.00007 | $0.00060 |
Grade A, and why
video-transcript-downloader 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 9d 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 Transcript Downloader
./scripts/vtd.js can:
- Print a transcript as a clean paragraph (timestamps optional).
- Download video/audio/subtitles.
Transcript behavior:
- YouTube: fetch via
youtube-transcript-pluswhen possible. - Otherwise: pull subtitles via
yt-dlp, then clean into a paragraph.
Setup
cd ~/Projects/agent-scripts/skills/video-transcript-downloader && npm ci
Transcript (default: clean paragraph)
./scripts/vtd.js transcript --url 'https://…'
./scripts/vtd.js transcript --url 'https://…' --lang en
./scripts/vtd.js transcript --url 'https://…' --timestamps
./scripts/vtd.js transcript --url 'https://…' --keep-brackets
Download video / audio / subtitles
./scripts/vtd.js download --url 'https://…' --output-dir ~/Downloads
./scripts/vtd.js audio --url 'https://…' --output-dir ~/Downloads
./scripts/vtd.js subs --url 'https://…' --output-dir ~/Downloads --lang en
Formats (list + choose)
List available formats (format ids, resolution, container, audio-only, etc):
./scripts/vtd.js formats --url 'https://…'
Download a specific format id (example):
./scripts/vtd.js download --url 'https://…' --output-dir ~/Downloads -- --format 137+140
Prefer MP4 container without re-encoding (remux when possible):
./scripts/vtd.js download --url 'https://…' --output-dir ~/Downloads -- --remux-video mp4
Notes
- Default transcript output is a single paragraph. Use
--timestampsonly when asked. - Bracketed cues like
[Music]are stripped by default; keep them via--keep-brackets. - Pass extra
yt-dlpargs after--fortranscriptfallback,download,audio,subs,formats.
./scripts/vtd.js formats --url 'https://…' -- -v
Troubleshooting (only when needed)
- Missing
yt-dlp/ffmpeg:
brew install yt-dlp ffmpeg
- Verify:
yt-dlp --version
ffmpeg -version | head -n 1
What ships with it
4 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.
- 9d ago First seen · 83 lines · 70 tokens per session scan A 07ab011788b8
video-transcript-downloader is a skill published in the GitHub repository marchatton/agent-skills (5 stars, last pushed 6mo ago), licensed MIT. It adds 70 tokens to every session and 603 once invoked, about $0.0003 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 2026-08-31.
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