youtube-summarizer

Overview

This public intake copy packages

plugins/antigravity-awesome-skills-claude/skills/youtube-summarizer

https://github.com/sickn33/antigravity-awesome-skills

Use it when the operator needs the upstream workflow, support files, and repository context to stay intact while the public validator and private enhancer continue their normal downstream flow.

This intake keeps the copied upstream files intact and uses

metadata.json

ORIGIN.md

youtube-summarizer

Imported source sections that did not map cleanly to the public headings are still preserved below or in the support files. Notable imported sections: Purpose, 📝 Detailed Summary, 📚 Concepts and Terminology, 📌 Conclusion, 📊 Executive Summary, Limitations.

When to Use This Skill

Use this section as the trigger filter. It should make the activation boundary explicit before the operator loads files, runs commands, or opens a pull request.

• User provides a YouTube video URL and wants a detailed summary
• User needs to document video content for reference without rewatching
• User wants to extract insights, key points, and arguments from educational content
• User needs transcripts from YouTube videos for analysis
• User asks to "summarize", "resume", or "extract content" from YouTube videos
• User wants comprehensive documentation prioritizing completeness over brevity

Operating Table

metadata.json

ORIGIN.md

scripts/extract-transcript.py

scripts/install-dependencies.sh

## Related Skills

Workflow

This workflow is intentionally editorial and operational at the same time. It keeps the imported source useful to the operator while still satisfying the public intake standards that feed the downstream enhancer flow.

1. Yes - Install with pip (pip install youtube-transcript-api)
2. No - I'll install it manually
3. 20 characters wide (use █ for filled, ░ for empty)
4. Percentage increments: Step 1=20%, Step 2=40%, Step 3=60%, Step 4=80%, Step 5=100%
5. Step counter showing current/total (e.g., "Step 3/5")
6. Brief description of current phase
7. https://www.youtube.com/watch?v=VIDEO_ID

Imported Workflow Notes

Imported: Step 0: Discovery & Setup

Before processing videos, validate the environment and dependencies:

# Check if youtube-transcript-api is installed
python3 -c "import youtube_transcript_api" 2>/dev/null
if [ $? -ne 0 ]; then
    echo "⚠️  youtube-transcript-api not found"
    # Offer to install
fi

# Check Python availability
if ! command -v python3 &>/dev/null; then
    echo "❌ Python 3 is required but not installed"
    exit 1
fi

Ask the user if dependency is missing:

youtube-transcript-api is required but not installed.

Would you like to install it now?
- [ ] Yes - Install with pip (pip install youtube-transcript-api)
- [ ] No - I'll install it manually

If user selects "Yes":

pip install youtube-transcript-api

Verify installation:

python3 -c "import youtube_transcript_api; print('✅ youtube-transcript-api installed successfully')"

Imported: Main Workflow

Progress Tracking Guidelines

Throughout the workflow, display a visual progress gauge before each step to keep the user informed. The gauge format is:

echo "[████░░░░░░░░░░░░░░░░] 20% - Step 1/5: Validating URL"

Format specifications:

• 20 characters wide (use █ for filled, ░ for empty)
• Percentage increments: Step 1=20%, Step 2=40%, Step 3=60%, Step 4=80%, Step 5=100%
• Step counter showing current/total (e.g., "Step 3/5")
• Brief description of current phase

Display the initial status box before Step 1:

╔══════════════════════════════════════════════════════════════╗
║     📹  YOUTUBE SUMMARIZER - Processing Video                ║
╠══════════════════════════════════════════════════════════════╣
║ → Step 1: Validating URL                 [IN PROGRESS]       ║
║ ○ Step 2: Checking Availability                              ║
║ ○ Step 3: Extracting Transcript                              ║
║ ○ Step 4: Generating Summary                                 ║
║ ○ Step 5: Formatting Output                                  ║
╠══════════════════════════════════════════════════════════════╣
║ Progress: ██████░░░░░░░░░░░░░░░░░░░░░░░░  20%               ║
╚══════════════════════════════════════════════════════════════╝

Step 1: Validate YouTube URL

Objective: Extract video ID and validate URL format.

Supported URL Formats:

• https://www.youtube.com/watch?v=VIDEO_ID

• https://youtube.com/watch?v=VIDEO_ID

• https://youtu.be/VIDEO_ID

• https://m.youtube.com/watch?v=VIDEO_ID

Actions:

# Extract video ID using regex or URL parsing
URL="$USER_PROVIDED_URL"

# Pattern 1: youtube.com/watch?v=VIDEO_ID
if echo "$URL" | grep -qE 'youtube\.com/watch\?v='; then
    VIDEO_ID=$(echo "$URL" | sed -E 's/.*[?&]v=([^&]+).*/\1/')
# Pattern 2: youtu.be/VIDEO_ID  
elif echo "$URL" | grep -qE 'youtu\.be/'; then
    VIDEO_ID=$(echo "$URL" | sed -E 's/.*youtu\.be\/([^?]+).*/\1/')
else
    echo "❌ Invalid YouTube URL format"
    exit 1
fi

echo "📹 Video ID extracted: $VIDEO_ID"

If URL is invalid:

❌ Invalid YouTube URL

Please provide a valid YouTube URL in one of these formats:
- https://www.youtube.com/watch?v=VIDEO_ID
- https://youtu.be/VIDEO_ID

Example: https://www.youtube.com/watch?v=dQw4w9WgXcQ

Step 2: Check Video & Transcript Availability

Progress:

echo "[████████░░░░░░░░░░░░] 40% - Step 2/5: Checking Availability"

Objective: Verify video exists and transcript is accessible.

Actions:

from youtube_transcript_api import YouTubeTranscriptApi, TranscriptsDisabled, NoTranscriptFound
import sys

video_id = sys.argv[1]

try:
    # Get list of available transcripts
    transcript_list = YouTubeTranscriptApi.list_transcripts(video_id)
    
    print(f"✅ Video accessible: {video_id}")
    print("📝 Available transcripts:")
    
    for transcript in transcript_list:
        print(f"  - {transcript.language} ({transcript.language_code})")
        if transcript.is_generated:
            print("    [Auto-generated]")
    
except TranscriptsDisabled:
    print(f"❌ Transcripts are disabled for video {video_id}")
    sys.exit(1)
    
except NoTranscriptFound:
    print(f"❌ No transcript found for video {video_id}")
    sys.exit(1)
    
except Exception as e:
    print(f"❌ Error accessing video: {e}")
    sys.exit(1)

Error Handling:

Step 3: Extract Transcript

Progress:

echo "[████████████░░░░░░░░] 60% - Step 3/5: Extracting Transcript"

Objective: Retrieve transcript in preferred language.

Actions:

from youtube_transcript_api import YouTubeTranscriptApi

video_id = "VIDEO_ID"

try:
    # Try to get transcript in user's preferred language first
    # Fall back to English if not available
    transcript = YouTubeTranscriptApi.get_transcript(
        video_id, 
        languages=['pt', 'en']  # Prefer Portuguese, fallback to English
    )
    
    # Combine transcript segments into full text
    full_text = " ".join([entry['text'] for entry in transcript])
    
    # Get video metadata
    from youtube_transcript_api import YouTubeTranscriptApi
    transcript_list = YouTubeTranscriptApi.list_transcripts(video_id)
    
    print("✅ Transcript extracted successfully")
    print(f"📊 Transcript length: {len(full_text)} characters")
    
    # Save to temporary file for processing
    with open(f"/tmp/transcript_{video_id}.txt", "w") as f:
        f.write(full_text)
    
except Exception as e:
    print(f"❌ Error extracting transcript: {e}")
    exit(1)

Transcript Processing:

• Combine all transcript segments into coherent text
• Preserve punctuation and formatting where available
• Remove duplicate or overlapping segments (if auto-generated artifacts)
• Store in temporary file for analysis

Step 4: Generate Comprehensive Summary

Progress:

echo "[████████████████░░░░] 80% - Step 4/5: Generating Summary"

Objective: Apply enhanced STAR + R-I-S-E prompt to create detailed summary.

Prompt Applied:

Use the enhanced prompt from Phase 2 (STAR + R-I-S-E framework) with the extracted transcript as input.

Actions:

1. Load the full transcript text
2. Apply the comprehensive summarization prompt
3. Use AI model (Claude/GPT) to generate structured summary
4. Ensure output follows the defined structure:
   • Header with video metadata
   • Executive synthesis
   • Detailed section-by-section breakdown
   • Key insights and conclusions
   • Concepts and terminology
   • Resources and references

Implementation:

# Use the transcript file as input to the AI prompt
TRANSCRIPT_FILE="/tmp/transcript_${VIDEO_ID}.txt"

# The AI agent will:
# 1. Read the transcript
# 2. Apply the STAR + R-I-S-E summarization framework
# 3. Generate comprehensive Markdown output
# 4. Structure with headers, lists, and highlights

Read "$TRANSCRIPT_FILE"  # Read transcript into context

Then apply the full summarization prompt (from enhanced version in Phase 2).

Step 5: Format and Present Output

Progress:

echo "[████████████████████] 100% - Step 5/5: Formatting Output"

Objective: Deliver the summary in clean, well-structured Markdown.

Output Structure:

# [Video Title]

**Canal:** [Channel Name]  
**Duração:** [Duration]  
**URL:** [https://youtube.com/watch?v=VIDEO_ID]  
**Data de Publicação:** [Date if available]

#### Imported: Purpose

This skill extracts transcripts from YouTube videos and generates comprehensive, verbose summaries using the STAR + R-I-S-E framework. It validates video availability, extracts transcripts using the `youtube-transcript-api` Python library, and produces detailed documentation capturing all insights, arguments, and key points.

The skill is designed for users who need thorough content analysis and reference documentation from educational videos, lectures, tutorials, or informational content.

## Examples

### Example 1: Ask for the upstream workflow directly

```text
Use @youtube-summarizer to handle <task>. Start from the copied upstream workflow, load only the files that change the outcome, and keep provenance visible in the answer.

Explanation: This is the safest starting point when the operator needs the imported workflow, but not the entire repository.

Example 2: Ask for a provenance-grounded review

Review @youtube-summarizer against metadata.json and ORIGIN.md, then explain which copied upstream files you would load first and why.

Explanation: Use this before review or troubleshooting when you need a precise, auditable explanation of origin and file selection.

Example 3: Narrow the copied support files before execution

Use @youtube-summarizer for <task>. Load only the copied references, examples, or scripts that change the outcome, and name the files explicitly before proceeding.

Explanation: This keeps the skill aligned with progressive disclosure instead of loading the whole copied package by default.

Example 4: Build a reviewer packet

Review @youtube-summarizer using the copied upstream files plus provenance, then summarize any gaps before merge.

Explanation: This is useful when the PR is waiting for human review and you want a repeatable audit packet.

Best Practices

Treat the generated public skill as a reviewable packaging layer around the upstream repository. The goal is to keep provenance explicit and load only the copied source material that materially improves execution.

• Keep the imported skill grounded in the upstream repository; do not invent steps that the source material cannot support.
• Prefer the smallest useful set of support files so the workflow stays auditable and fast to review.
• Keep provenance, source commit, and imported file paths visible in notes and PR descriptions.
• Point directly at the copied upstream files that justify the workflow instead of relying on generic review boilerplate.
• Treat generated examples as scaffolding; adapt them to the concrete task before execution.
• Route to a stronger native skill when architecture, debugging, design, or security concerns become dominant.

Troubleshooting

Problem: The operator skipped the imported context and answered too generically

Symptoms: The result ignores the upstream workflow in

plugins/antigravity-awesome-skills-claude/skills/youtube-summarizer

metadata.json

ORIGIN.md

Problem: The imported workflow feels incomplete during review

Symptoms: Reviewers can see the generated

SKILL.md

Problem: The task drifted into a different specialization

Symptoms: The imported skill starts in the right place, but the work turns into debugging, architecture, design, security, or release orchestration that a native skill handles better. Solution: Use the related skills section to hand off deliberately. Keep the imported provenance visible so the next skill inherits the right context instead of starting blind.

Related Skills

• @00-andruia-consultant-v2

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @10-andruia-skill-smith-v2

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @20-andruia-niche-intelligence-v2

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @3d-web-experience-v2

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

Additional Resources

Use this support matrix and the linked files below as the operator packet for this imported skill. They should reflect real copied source material, not generic scaffolding.

references

references/n/a

examples

examples/n/a

scripts

scripts/extract-transcript.py

agents

agents/n/a

assets

assets/n/a

• extract-transcript.py
• install-dependencies.sh
• CHANGELOG.md
• README.md
• extract-transcript.py
• install-dependencies.sh

Imported Reference Notes

Imported: 📝 Detailed Summary

[Topic 1]

[Comprehensive explanation with examples, data, quotes...]

[Subtopic 1.1]

[Detailed breakdown...]

[Topic 2]

[Continued detailed analysis...]

Imported: 📚 Concepts and Terminology

• [Term 1]: [Definition and context]
• [Term 2]: [Definition and context]

Imported: 📌 Conclusion

[Final synthesis and takeaways]

Example 2: Missing Dependency

User Input:

claude> summarize this youtube video https://youtu.be/abc123

Skill Response:

⚠️  youtube-transcript-api not installed

This skill requires the Python library 'youtube-transcript-api'.

Would you like me to install it now?
- [ ] Yes - Install with pip
- [ ] No - I'll install manually

User selects "Yes":

$ pip install youtube-transcript-api
Successfully installed youtube-transcript-api-0.6.1

✅ Installation complete! Proceeding with video summary...

Example 4: Invalid URL

User Input:

claude> summarize youtube video www.youtube.com/some-video

Skill Response:

❌ Invalid YouTube URL format

Expected format examples:
- https://www.youtube.com/watch?v=VIDEO_ID
- https://youtu.be/VIDEO_ID

Please provide a valid YouTube video URL.

Imported: 📊 Executive Summary

This video provides a comprehensive introduction to the fundamental concepts of Artificial Intelligence (AI), designed for beginners and professionals who want to understand the technical foundations and practical applications of modern AI. The instructor covers everything from basic definitions to machine learning algorithms, using practical examples and visualizations to facilitate understanding.

[... continued detailed summary ...]

**Save Options:**

What would you like to save? → Summary + raw transcript

✅ File saved: resumo-exemplo123-2026-02-01.md (includes raw transcript) [████████████████████] 100% - ✓ Processing complete!

Welcome to this comprehensive tutorial on machine learning fundamentals. In today's video, we'll explore the core concepts that power modern AI systems...

Version: 1.2.0 Last Updated: 2026-02-02 Maintained By: Eric Andrade

Imported: Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.