OpenAI charges by the minute, so speed up your audio

When extracting transcripts from YouTube videos, can anyone give advice on the best (cost effective, quick, accurate) way to do this?

I'm confused because I read in various places that the YouTube API doesn't provide access to transcripts ... so how do all these YouTube transcript extractor services do it?

I want to build my own YouTube summarizer app. Any advice and info on this topic greatly appreciated!

If YouTube placed autogenerated captions you can download them free of charge with yt-dlp.

There's a tool that uses YouTube's unofficial APIs to get them if they're available:

https://github.com/jdepoix/youtube-transcript-api

For our internal tool that transcribes local city council meetings on YouTube (often 1-3 hours long), we found that these automatic ones were never available though.

(Our tool usually 'processes' the videos within ~5-30 mins of being uploaded, so that's also why none are probably available 'officially' yet.)

So we use yt-dlp to download the highest quality audio and then process them with whisper via Groq, which is way cheaper (~$0.02-0.04/hr with Groq compared to $0.36/hr via OpenAI's API.) Sometimes groq errors out so there's built-in support for Replicate and Deepgram as well.

We run yt-dlp on our remote Linode server and I have a Python script I created that will automatically login to YouTube with a "clean" account and extract the proper cookies.txt file, and we also generate a 'po token' using another tool:

https://github.com/iv-org/youtube-trusted-session-generator

Both cookies.txt and the "po token" get passed to yt-dlp when running on the Linode server and I haven't had to re-generate anything in over a month. Runs smoothly every day.

(Note that I don't use cookies/po_token when running locally at home, it usually works fine there.)

Very useful, thanks. So does this mean that every month or so you have to create a new 'clean' YouTube account and use that to create new po_token/cookies?

It's frustrating to have to jump through all these hoops just to extract transcripts when the YouTube Data API already gives reasonable limits to free API calls ... would be nice if they allowed transcripts too.

Do you think the various YouTube transcript extractor services all follow a similar method as yours?

You can use yt-dlp to get the transcripts. For instance, to grab just the transcript of a video:

    ./yt-dlp --skip-download --write-sub --write-auto-sub --sub-lang en --sub-format json3 <youtube video URL>

You can also feed the same command a playlist or channel URL and it'll run through and grab all the transcripts for each video in the playlist or channel.

That's cool, thanks for the info. But do you also have to use a rotating proxy to prevent YouTube from blocking your IP address?

Last time I ran this at scale was a couple of months ago, so my information is no doubt out of date, but in my experience, YouTube seems less concerned about this than they are when you're grabbing lots of videos.

But that was a few months ago, so for all I know they've tightened down more hatches since then.