DH used to have CC on all the time. I found it odd that a pre-recorded show or movie, where they had lots of time to get the captions right, would be loaded with mistakes. But live TV shows, like sports, the CC was almost perfect! Also, back in the days of VHS, a lot of movies that were "CC" would start out, the first 15 minutes with captions, then nothing for most of the movie, then the last 5 minutes would have them again.