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 glebis/claude-skills --skill youtube-transcriptgit clone --depth 1 https://github.com/glebis/claude-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/glebis/claude-skills/youtube-transcript)<a href="https://agentmods.dev/skills/glebis/claude-skills/youtube-transcript"><img src="https://agentmods.dev/badge/skills/glebis/claude-skills/youtube-transcript.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00057 | $0.00547 |
| Opus 5 | $0.00028 | $0.00273 |
| Sonnet 5 | $0.00011 | $0.00109 |
| Haiku 4.5 | $0.00006 | $0.00055 |
Grade A, and why
youtube-transcript 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 4d 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 — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
YouTube Transcript
Overview
Extract YouTube video transcripts, metadata, and chapters using yt-dlp. Output formatted as Markdown with YAML frontmatter, saved to ~/Brains/brain/ (Obsidian vault).
Quick Start
To extract a transcript from a YouTube video:
python scripts/extract_transcript.py <youtube_url>
Optional: Specify custom output filename:
python scripts/extract_transcript.py <youtube_url> custom_filename.md
Output Format
YAML Frontmatter
The generated Markdown includes comprehensive metadata:
title- Video titlechannel- Channel nameurl- YouTube URLupload_date- Upload date (YYYY-MM-DD)duration- Video duration (HH:MM:SS)description- Video description (truncated to 500 chars)tags- Array of video tagsview_count- View countlike_count- Like count
Body Structure
Transcript organized by video chapters (if available):
## Chapter Title
**00:05:23** Transcript text for this segment.
**00:05:45** Next segment text.
If no chapters exist, all content appears under "## Transcript" heading.
Timestamps formatted as HH:MM:SS for consistency.
Workflow
- Extract metadata and subtitles using yt-dlp
- Parse VTT subtitle format to extract timestamps and text
- Group transcript segments by video chapters (if present)
- Format as Markdown with YAML frontmatter
- Save to ~/Brains/brain/ with sanitized filename based on video title
- Clean up temporary subtitle files
Deduplication
To remove duplicates from existing transcript files:
python scripts/deduplicate_transcript.py <markdown_file>
This removes transcript entries that are prefixes of subsequent entries (common in VTT files where subtitles accumulate).
Requirements
Ensure yt-dlp is installed:
pip install yt-dlp
Limitations
- Extracts subtitles in English first, falls back to Russian if English unavailable
- Requires video to have subtitles (auto-generated or manual)
- Does not download video or audio files
- Description truncated to 500 characters in frontmatter
What ships with it
3 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.
- 4d ago First seen · 91 lines · 57 tokens per session scan A b7ea7c712570
youtube-transcript is a skill published in the GitHub repository glebis/claude-skills (374 stars, last pushed 6d ago), licensed MIT. It adds 57 tokens to every session and 547 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 2026-09-03.
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