Adam's lesson on controlled vibrato. Particularly good because he shows what he started out sounding like, what he sounds like now and some practical advice on how to get there.
And begin totally partisan about it, this for me is the template for throat vibrato in a blues setting. Starting with four bars of solid triplets locked to the beat, with a singing quality. And a variety of notes with and without vibrato throughout. You may have your own favs.
