I vaguely recall a documentary about the very real conflict in the deaf community regarding restoring hearing (especially to the very young) via cochlear implan

I vaguely recall a documentary about the very real conflict in the deaf community regarding restoring hearing (especially to the very young) via cochlear implants, etc. Leaving aside that particular element, one of the other controversies was about a specific form of sign that is essentially a signed phonetic alphabet. So while it's (obviously) not compatible with regular sign languages - which have visual representation of grammar and meaning - it does have the benefit that those who learn it are primarily fluent in their native language, which many deaf people are not especially good at, since it's always been a language that they only learn from books. And you can learn a new oral language the same way that the rest of us do - instead of sounding it out with your mouth, you sign it out with your hands. But I can never seem to find more information about it, and can't recall the documentary name for the life of me. Since you seem to have at least some familiarity with this, do you happen to know what I'm talking about?