How can I get access to the YouTube transcriptions API?
The standalone YouTube transcriptions API is no longer available. You can still use YouTube content with SiteSpeakAI: add a YouTube video or channel as a training source and SiteSpeakAI pulls in the transcript automatically, so your chatbot can answer questions about your videos. To set this up, open your chatbot, go to “Training & Content”, add a new source, and paste your YouTube video or channel URL.
From the blog