YouTube Voice Summarizer

Transform any YouTube video into a professional voice summary delivered in under 60 seconds.

What It Does

When a user sends a YouTube URL, this skill:

1. Extracts the video transcript via Supadata
2. Generates a concise AI summary via OpenRouter/Cerebras
3. Converts the summary to natural speech via ElevenLabs
4. Returns an audio file the user can listen to

Requirements

This skill requires a running backend server. Deploy the summarizer service:

git clone https://github.com/Franciscomoney/elevenlabs-moltbot.git
cd elevenlabs-moltbot
npm install
cp .env.example .env
# Add your API keys to .env
npm start

Required API Keys

| Service | Purpose | Get Key | |---------|---------|---------| | ElevenLabs | Text-to-speech | https://elevenlabs.io | | Supadata | YouTube transcripts | https://supadata.ai | | OpenRouter | AI summarization | https://openrouter.ai |

How to Use

When user sends a YouTube URL:

Step 1: Start the voice summary job

curl -s -X POST http://127.0.0.1:3050/api/summarize \
  -H "Content-Type: application/json" \
  -d '{"url":"YOUTUBE_URL","length":"short","voice":"podcast"}'

Returns: {"jobId": "job_xxx", "status": "processing"}

Step 2: Poll for completion (wait 3-5 seconds between checks)

curl -s http://127.0.0.1:3050/api/status/JOB_ID

Keep polling until status is "completed".

Step 3: Return the audio to user

When complete, the response includes:

• result.audioUrl - The MP3 audio URL (send this to the user!)
• result.teaser - Short hook text about the content
• result.summary - Full text summary
• result.keyPoints - Array of key takeaways

Send the user:

1. The teaser text as a message
2. The audio URL so they can listen

Voice Options

| Voice | Style | |-------|-------| | podcast | Deep male narrator (default) | | news | British authoritative | | casual | Friendly conversational | | female_warm | Warm female voice |

Summary Lengths

| Length | Duration | Best For | |--------|----------|----------| | short | 1-2 min | Quick overview | | medium | 3-5 min | Balanced detail | | detailed | 5-10 min | Comprehensive |

Example Flow

User: "Summarize this: https://www.youtube.com/watch?v=dQw4w9WgXcQ"

1. Start job:

curl -s -X POST http://127.0.0.1:3050/api/summarize \
  -H "Content-Type: application/json" \
  -d '{"url":"https://www.youtube.com/watch?v=dQw4w9WgXcQ","length":"short","voice":"podcast"}'

2. Poll status with the returned jobId
3. When complete, send the audioUrl to the user

Text-Only Summary (No Audio)

For faster, cheaper text-only summaries:

curl -s -X POST http://127.0.0.1:3050/api/quick-summary \
  -H "Content-Type: application/json" \
  -d '{"url":"YOUTUBE_URL","length":"short"}'

Troubleshooting

"Video may not have captions"

• The video needs subtitles enabled on YouTube
• Auto-generated captions may take time on new videos

Audio URL not working

• Ensure BASE_URL in .env is publicly accessible
• Check firewall allows traffic on port 3050

Cost Per Summary

| Service | Cost | |---------|------| | Supadata | ~$0.001 | | OpenRouter | ~$0.005-0.02 | | ElevenLabs | ~$0.05-0.15 | | Total | ~$0.06-0.17 |