Just yesterday there was a post to one of Geerling's pages where he posts the transcript to a video he's made. He could have just made a text blog and not spent the extra effort of making a video, but that's not what he does. Instead, he went the extra step to make the content available in text only. He could have just as easily left it as video only. (yes yes, creating a text only transcript of video in today's world is trivial, but an extra step nonetheless as it still needs to be added to his CMS to make the webpage)