For those who have been asking/needing English closed captions on our webcast videos, they have been available for quite some time now. That is, YouTube has already been automatically scanning our audio tracks and doing speech-to-text transcriptions. Because it is computer generated, it will get words wrong and doesn't know anything about punctuation. Despite this, it is rather accurate, given the current state of technology.
To view these computer generated captions, simply click the CC icon at the bottom right of the video player.