These "inspiring" videos continue to push one of the most problematic narratives in the history of the Deaf community: that deaf people are broken and therefore need to be "fixed." In reality, there's no such thing as a happily-ever-after.
I can definitely see now why he doesn't like the videos if seeing deaf people getting their hearing for the first time. It must feel really bad to be labeled handy capped my societies norms. He's trying to get across that there is nothing wrong with deaf people and they don't need to be "fixed", because they live the same life we do just without the hearing.