The Collaborative for Communication Access via Captioning has created an excellent video showing how real people are impacted by the lack of captioning. The title of the video says it all: “Don’t Leave Me Out”.
If you are a Mac user, I have created a couple of videos on how to caption QuickTime movies that are available from the Tech Ease 4 All website I worked on at the University of South Florida. I caption my videos with a $99 program called MovieCaptioner from Synchrimedia.
These videos are themselves closed captioned, of course.