FactWatch is a free Chrome add-on designed for YouTube users who want to verify the accuracy of video content. This innovative tool integrates a sidebar that provides real-time fact-checking by analyzing video transcripts and identifying claims that may be misleading or false. Users can initiate the analysis by clicking 'Analyze video', which prompts FactWatch to extract checkable assertions from the transcript, rating each as True, Misleading, or False. The application also features toast alerts that notify users when questionable claims are made, along with timeline markers indicating where these claims appear in the video.

In addition to its automatic analysis, FactWatch offers a manual mode for users to input specific claims for immediate verification. The add-on supports multiple AI providers, allowing users to select their preferred source for fact-checking. With a focus on privacy, FactWatch operates entirely within the user's browser, ensuring that no data is sent to external servers. The tool is compatible with various browsers, including Edge, Opera, and Brave, making it accessible to a wide range of users.