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AI · April 21, 2025

YouTube Companion extension

Enhance YouTube with AI-powered analysis and learning tools

YouTube Companion extension launched on April 21, 2025 with 18 votes, #1,132 of 7,818 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.

What it does

Transform your YouTube experience with AI analysis tools that provide instant fact-checking, key vocabulary definitions, content simplification, video outlines with timestamps, and QA functionality - all in an unobtrusive sidebar.

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