YouTube FactCheck is a Chrome extension designed to provide AI-powered fact-checking features directly within the YouTube platform. This tool allows users to verify claims made in videos with just a click, making it easier to discern the accuracy of information. Key features include the ability to analyze full videos or just the last two minutes, ensuring that viewers can focus on the most relevant content. The results are presented in a sidebar, allowing for seamless viewing without interruptions.

Privacy is a priority with YouTube FactCheck, as all processing is done locally on the user's device, meaning no personal information is collected or browsing history tracked. Users can easily obtain a free API key through the extension, and recent fact checks are cached for quick access. This extension enhances the overall YouTube experience by promoting informed viewing and critical analysis of video content.