Well, Factually
"So what you're saying is…"
Catches every claim, live, while you watch. Local-first inference option. Cross-vendor consensus on the cloud path.
Play the video — the sidebar on the right reveals fact-flag cards as the clip plays. It's the same UI the extension renders on YouTube, driven here by a synced preview timeline.
Use the recorded / live toggle in the sidebar header to switch modes. Recorded mode replays a transcript-verified session against actual sources. Live mode fires real Gemini 2.5 Flash calls per transcript segment (expect ~3-9s per card). Install the extension to fact-check any YouTube video using your own Vertex AI project — or fully local via LM Studio.
One-paragraph briefing on the video before captions arrive.
1–5 confidence scale, traffic-light coloring, pulse animation on high-confidence cards.
Every non-skipped flag gets an authoritative source attached asynchronously.
Five sourcing profiles — Primary, Centrist, Left, Right, All. Same product, both ends of the spectrum.
Opt-in. High-confidence flags get a second opinion from Meta Llama 4 + xAI Grok in parallel. "Consensus" badge when 2-of-3 vendors agree.
Bottom-of-player overlay on top flags. Follows fullscreen.
Any timestamp in the sidebar re-seeks the video.
Markdown log of every flag with YouTube deep-links back to the moment.
Local-only mode
No cloud calls, no API costs, no caption data egress. The entire pipeline — caption ingest, claim extraction, fact-check, citation retrieval — runs on your hardware via a local LM Studio endpoint.
Real privacy, not "we promise we won't log it" privacy.
Cloud path
Cloud mode authenticates directly against your Google Cloud Vertex AI project. There's no SaaS proxy between you and the model — the extension talks to Google, you pay Google, and there's nobody in the middle to leak, log, or rate-limit you.
Five minutes. Developer-mode unpacked extension — Chrome Web Store listing comes later.
Download the latest release
Grab the zip from the releases page and unzip it anywhere.
Open chrome://extensions
Paste it into the URL bar — Chrome blocks linking to chrome:// pages directly.
Toggle Developer mode
Top-right corner of the extensions page.
Load unpacked
Click Load unpacked and point at the unzipped chrome-extension/ folder.
Fill in Options
Cloud mode: paste your Vertex AI project ID + a bearer token from gcloud auth print-access-token. Optional: drop in a free Google AI Studio key to route citations + dossier through a separate quota pool. Local mode: LM Studio endpoint URL.
Visit a YouTube video
The sidebar opens automatically. Receipts start arriving as the captions flow.
v0.6.0 (May 2026) added a Google AI Studio fallback — paste a free AI Studio key in Options and citation + dossier route through generativelanguage.googleapis.com instead of Vertex AI. The Download button always serves the latest release.