PopUpFactCheck Chrome Extension Brings Real-Time Fact-Checking to YouTube Videos

Independent developer userpostingcontent has released PopUpFactCheck, a Chrome extension that brings real-time fact-checking to YouTube videos by analyzing subtitles and overlaying verdicts directly on the video player. Available already has an official Chrome Web Store page and a dedicated website.

The extension uses AI to process the subtitle track, identifying statements that can be checked against authoritative databases. Currently, it supports only English subtitles, which limits its effectiveness for videos in other languages or those without subtitles. PopUpFactCheck displays color-coded bubbles over the video: green for true, red for false, and yellow for misleading or disputed claims.

To verify information, PopUpFactCheck cross-references claims with reputable sources such as Reuters, Associated Press, PolitiFact, Snopes, government data, and other fact-checking organizations. The tool is designed to distinguish between factual statements, opinions, metaphors, and rhetorical language, ensuring it only checks verifiable claims and ignores subjective commentary.

PopUpFactCheck works on both pre-recorded YouTube videos and live streams, including news broadcasts and press conferences. The extension is only active on YouTube and does not collect or sell user data, prioritizing privacy and platform-specific functionality.

The extension is free to use with a daily limit on fact-checks. Users can subscribe for $10 per month to remove these limits and gain early access to upcoming features. The project has quickly gained traction, with the developer's Reddit post attracting over 1,000 reactions and nearly 200 comments in just three days.

Given the current limitation to English subtitles, do you think PopUpFactCheck's approach is too restrictive, or could it pave the way for broader multilingual fact-checking tools?