YouTube summarizer that works when the video has no captions
Most YouTube summarizers read the caption file YouTube already has. No captions, no summary. YouTube Collector runs speech-to-text on the audio instead, so a video with captions turned off still gets a full transcript, a summary, and chapter timestamps.
Why some tools stall on a captionless video
NotebookLM imports only public YouTube videos that already have captions, user-added or auto-generated, and it pulls the existing text rather than transcribing the audio itself. If the creator disabled captions, or the upload is too fresh for YouTube to have made them, there's nothing to import.
YouTube Collector generates the transcript on demand. Your first 2 transcripts are free; after that they're billed in credits, since the speech-to-text runs on our side.
Side by side
| Feature | YouTube Collector | NotebookLM |
|---|---|---|
| Works when the video has no captions | Yes, AI transcript from the audio (first 2 free, then credits) | No, needs an existing caption file |
| Bulk playlist / channel import | Yes, in batches on Pro and Creator | One URL at a time |
| Summaries with clickable timecodes that seek the player | Yes, chapter outline jumps the in-app player | Transcript is a text block; you navigate by inline citations |
| Search across your whole library | Yes, one search over every transcript | Within a single notebook |
| Repurpose a video into a blog post, tweet thread, or LinkedIn post | Yes, built in | Not built for that |
| Community transcript cache | Yes, searchable | No |
Choose NotebookLM if your sources already have captions and you mainly want its notebook-style Q&A and audio overviews across mixed documents. It won't work on a video with the captions switched off.
FAQ
Does it really work with zero captions? Yes. We transcribe the audio, so the caption track doesn't need to exist. Spoken-word content (talks, podcasts, lectures) comes out cleanest. Videos up to 180 minutes are supported, and a long one takes two to five minutes to come back.
What does it cost? There's a real free tier, and your first 2 on-demand transcripts are free. Extra transcripts are billed in credits because the transcription runs on our servers.
Can I do a whole playlist of captionless videos? Yes. Paste one playlist or channel URL and Pro and Creator tiers import it in batches. Each video that needs a fresh transcript uses credits.
What if the video already has captions? Then you don't need on-demand transcription for it, and the summary, timestamps, and repurposing all work the same way.
Try one video
Paste a link that has no captions and see the transcript come back. Two are free, no card needed.
Spelling note: summariser and summarizer are the same word — US and UK spelling. Whichever way you searched, this page and YouTube Collector cover both.