Uploaded May 2026 | Updated September 2026, 3 weeks ago

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I built a complete YouTube Summarizer app using Cursor AI and Composer 2 - from zero to working product in 16 minutes. Paste a YouTube URL, get a TL;DR, key takeaways, and timestamped moments powered by AI. In this video I walk through the entire build: scaffolding the project with Cursor's Agent Window, building the UI with Composer 2, pulling YouTube transcripts, and wiring up AI summarization with the AI SDK and OpenRouter.

📖 Chapters:
00:00 The final product
00:07 The wheel spin challenge
00:25 Cursor it is
00:50 Setting up the project in Cursor
01:44 Installing skills (shadcn, Next.js, frontend design)
03:05 Building the UI with Composer 2
05:00 Testing the mockup UI
06:46 Pulling YouTube transcripts
08:21 Cursor's agent tests in the browser
09:37 Adding AI summarization with the AI SDK
11:02 Setting up OpenRouter for inference
13:37 Building the AI integration
14:28 Testing the final app
15:03 The result

🔗 Resources:
Cursor: cursor.com
AI SDK: sdk.vercel.ai
OpenRouter: openrouter.ai
shadcn/ui: ui.shadcn.com
Skills (skills.sh): https://skills.sh

Business & sponsorship enquiries: leon@cognaitiv.ai

#cursor #agenticcoding #vibecoding