YouTube Summary Skill

Summarize any YouTube video by fetching its transcript via Supadata API and generating a structured, readable summary.

Prerequisites

This skill requires a Supadata API key. The free tier is sufficient for personal use.

1. Sign up at supadata.ai
2. Get your API key from the dashboard
3. Set it as an environment variable:

   SUPADATA_API_KEY=sd_your_key_here
   

   Or provide it directly when prompted.

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Workflow

Step 1: Get the YouTube URL

Accept any of these formats:

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

Step 2: Fetch transcript via Supadata API

curl -s "https://api.supadata.ai/v1/youtube/transcript?url=VIDEO_URL" \
  -H "x-api-key: $SUPADATA_API_KEY"

Response format:

{
  "content": [
    {"text": "...", "offset": 0, "duration": 5000, "lang": "en"},
    ...
  ],
  "lang": "en",
  "availableLangs": ["en"]
}

Extract the text fields and concatenate to get the full transcript.

Step 3: Generate summary

Use the transcript text to produce a structured summary with these sections (adapt based on video content):

• 🎯 核心主题 — What is the video about?
• 📌 主要观点 — Key arguments or findings (3–7 bullet points)
• 📖 详细内容 — Expanded breakdown by section/topic
• 💡 结论 — Main takeaways or conclusions

Adjust language of summary to match the user's language preference.

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Error Handling

Error	Cause	Resolution
401 Unauthorized	Invalid or missing API key	Ask user to check their Supadata API key
404 Not Found	Video has no transcript / is private	Inform user the video has no available transcript
429 Rate Limited	Too many requests	Wait and retry, or upgrade Supadata plan
Empty content array	No captions available	Inform user and suggest they check if the video has captions

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Example Usage

User: "帮我总结一下这个视频 https://youtu.be/BU9sIfGVhIQ"

Agent workflow:

1. Call Supadata API with the URL
2. Parse and concatenate transcript text
3. Generate structured summary in Chinese (matching user language)
4. Present summary with emoji section headers

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Notes

• Supadata free tier has a monthly quota — sufficient for casual use
• Videos without auto-generated or manual captions cannot be transcribed
• For non-English videos, Supadata returns the transcript in the original language; summarize accordingly
• Do NOT use youtube-transcript-api Python library or yt-dlp — cloud server IPs are blocked by YouTube. Always use Supadata API.