TIL captions make deaf or hard of hearing people hear.
The educational value of these “in brief” sections is bad. The goal is not that “videos can be played with captions”, it’s ensuring audio-only content can be perceived by deaf/HoH people. Why does it say “synchronized text”? What is “existing videos”? Why should non-existing videos have captions? And it’s important because people who are deaf/HoH need to be able to perceive content only available as audio.