Extract Audio Transcriptions from Youtube

Select the "three dot" settings menu beneath the video

Select "Show Transcript"

The transcription opens next to the video window on the right. It has timestamps against the transcription which need disabling. We will do this in the next step

Select the "three dot" settings menu top right of the transcription panel

Select "toggle timestamps"

You are now able to copy and paste the transcript in the usual way.

Don't forget: Audio transcriptions are likely to contain transcription errors so you should remember to read through and edit any mistakes.