An important part of the Youtube content is the transcript at the bottom of the video description. There are some 3rd-party sites that collect and share the YT transcripts separately but then the naive admins put the service in Cloudflare’s walled garden, which is worse than YT itself and purpose-defeating to a large extent. (exceptionally this service is CF-free, but it says “Transcript is disabled on this video” in my test: https://youtubetranscript.io/)
Invidious should be picking up the slack here.
And Lemmy could do better by automatically fetching the transcript of youtube/invidious links and include it, perhaps spoiler style like this.
Thanks for the tip about transcriptly.org… looks useful. Otter did not work for me… perhaps it is anti-Tor. And rev.com looks like a closed-source mobile app. But in any case, transcriptly might be a useful alternative.