How to search inside a long video or lecture
Find the one moment you need in a three-hour recording — by meaning, not just keywords — and jump straight to it.
Make the recording searchable in one click
Open a supported lecture or long video and click Silestis. It returns a searchable transcript; with a timestamp-capable mode, results can jump back to the relevant source moment.
Search by meaning, across everything
Semantic search finds the right moment even when the exact words differ — ask "where does she explain gradient descent?" and land on the answer. Across a whole semester or a video library, it searches every transcript at once, so you find the needle without re-watching.
FAQ
Can I search across many recordings at once?
Yes. Semantic search spans your whole library, finding the relevant moment by meaning across hundreds of transcripts — not just exact keyword matches.
Does it handle multi-hour recordings?
Yes. Long-form transcription handles multi-hour videos, and paid plans support recordings up to 2–10 hours depending on the plan.
Start from the supported lecture page you already use.
Open the video and click Silestis to start a transcript, summary, and notes workflow on the page. Timestamp-capable modes can also return cited answers, including when no source transcript exists.
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