Do you have any idea how long it takes to add subtitles to a video? My point was, and still is, that it is always easier to criticize work of others (and complain when something is "missing") than doing the work yourself. If someone had come out and said: I've produced X videos and added subtitles to Y (where both X and Y are relatively large numbers) and I am disappointed that so few authors do the same ... then I would respect the statement as valid criticism.

How can he do the work himself if he can't hear?

You don't need to hear to produce your own videos AND add subtitles to them. Some people create, others criticize.

_hard of hearing_ and _can't hear_ are very different.