In the description of videos I see a "Show Transcript" button. I believe this is automatically generated. It's not grouped into sentences though, so there is room for improvement.
https://github.com/Dicklesworthstone/youtube_transcript_clea...
Now that I think about it, this would work equally well for the transcripts generated by my new tool. I should just include that html file in my new repo as an added feature.
An iOS app is also coming soon so you’ll be able to listen and read while offline