The A to Z of electronics videos by Jeri Ellsworth now have text transcripts and captions. Jeri will be adding the caption files to YouTube shortly and the text for each video is located on each post here on the Adafruit site. The text is great for folks to read along and for search engines to see the content, the captions are great for the hearing impaired. We use 3playmedia for our transcripts. It was $39.12 for all three in any format(s) we needed.

You can view all the videos here with the transcripts.