No one is expecting a 0% error rate. As long as it is on par (or better) and faster than humans, that's good enough to get the ball rolling.

Curious to see how I fared at the task (first vid), I used just over 4 minutes writing down the books with readable titles - and got 36 of them. Seems like there are 56-57 or something like that. So I roughly got two thirds of the books in the video. But that's still 4 minute of pausing and sliding the video for the book titles alone.