MensorAI Reviews — Discover what people think of this product.

MensorAI is a personal knowledge system for YouTube learners.

The Extension

A sidebar that lives directly on YouTube. Click the toggle and a notes panel slides in beside any video. Write notes while you watch, no tab switching, no friction. The editor supports rich text formatting, timestamps that link back to video moments, and auto-saves everything as you type.

Need help extracting value? Type / to open slash commands. Ask AI to summarize the video, pull out key insights, explain concepts simply, or quiz you on the content. The AI has full access to the transcript, so it actually understands what you're watching.

The Library

Every video you take notes on gets saved to your personal library in the web app. Search across video titles, channels, and your own notes. Filter by tags, sort by date or views, track which videos have pending action items. It's your second brain for everything you've learned on YouTube. Organized and searchable.

Lessons

Turn your private notes into public lessons. Share your insights with the community, browse what others have learned, and discover videos through the lens of what people actually took away from them. Learning becomes collaborative.

AI Conversations

You can chat with your whole library and have conversations about any video. Ask follow-up questions, dive into specific topics, get clarification on complex ideas. All grounded in the actual transcript so the AI stays relevant and accurate.

Free forever for unlimited videos and notes. Premium unlocks advanced AI features.