On the YouTube website, if you click the "・・・" button next to share/clip/save, there is a "Show transcript" option and you can use your browsers in-page search to search in it

that's for specific vid, the site shared above lets you search Indexing over 760 million captions across 687 million videos and 52 million channels.

There’s a website designed for language learning from watching YouTube captions with inline translations and dictionary lookup. It also has support for searching videos by subtitle content. But it has a limited index and isn’t free for all features. I thought its source was available but I can’t find it now… https://languageplayer.io/

Show HN: YouTube Full Text Search – Search all of a channel from the commandline

https://news.ycombinator.com/item?id=36009774

Searching transcripts is really something YouTube itself should be doing as part of just regular search (and fed into Google search too). I have a feeling the regular search already does it to some extent, as the system presumably is tagging videos based on its caption extraction. However, that would only apply to somewhat broad topics, not specific combinations of words and the matching text is not surfaced in the UI.

That's a good website you posted.

I encountered the "need" for this functionality a few years ago to find the video of a YouTuber specifically saying something.

Back then I used a website that's actually specifically dedicated to the YouTuber (Northernlion): https://babypig.men/nlss-search?q=Basmati

I'm surprised the website is still live!

YouTube just added a feature to search transcripts. Seems like I might be in an experiment though

I wanted, but when I press ENTER, it asks to register... I click cancel and notice PRICING page. I click on it and again it asks for login. That is NOT how one onboards users.

Despite the rude comments you left on my contact form, I have noted your point and am making changes to fix this.

I didn't left any comments there at all :) And I hope my HN comment wasn't rude.

Its fixed now unfortunately the email you provided on the contact form bounces.