For the videos ChatGPT & NotebookLM can't open
AI assistants can only read what they can reach. Silestis works on the page you're already on — including gated, on-page, and transcript-less video.
Why AI assistants go blind here
General assistants — ChatGPT, Gemini, NotebookLM, Perplexity, Claude — can only work with content they can technically reach: a public URL they can fetch, an existing transcript or caption, or a file you upload. That leaves a huge, valuable class of video untouched: anything behind a login (Panopto, Zoom, Kaltura, corporate LMS, SharePoint/OneDrive, Google Drive) and anything with no transcript — short of downloading the file and uploading it yourself. Paste a gated lecture link into ChatGPT and it simply can't open it.
How Silestis reaches it
Silestis runs in your browser, on the page you already have open and are already allowed to watch. It captures the audio or captions on the page — your session and cookies never leave the browser — and, when there's no caption, transcribes the audio with AI. Then it gives you a summary, timestamped answers, notes, and a searchable transcript. Click Silestis on that same lecture and you have answers in about 30 seconds per hour of audio.
Where it matters most
- University lecture portals — Panopto, Zoom, Kaltura, and LMS-hosted recordings.
- Corporate webinars, training, and compliance video.
- SharePoint, OneDrive, and Google Drive videos.
- Any recording that simply has no transcript to paste anywhere.
See it for lectures, or how Silestis compares to NotebookLM.
FAQ
Does Silestis bypass logins, paywalls, or DRM?
No. Silestis only works on content you already have access to, in your own authenticated session, on the page you opened yourself. It doesn't bypass access controls, paywalls, or DRM.
What if the video has no transcript at all?
That's the core case. When there's no caption to use, Silestis transcribes the audio on the page with AI — about 30 seconds per hour — so you still get answers, a summary, and a searchable transcript.
The next lecture your AI tools can't open — Silestis can.
Open the video, click Silestis, done — a summary, timestamped answers, and notes, right on the page. Even when there's no transcript.
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