As a singer who has sung the dramatic tenor repertoire, I can tell you that he has a great sound. It is masculine and very beautiful. Lyric voices are like the fuzz on a peach: they are soft and finish sweetly. Dramatic voices are masculine and convey a nobility of sound. Dramatic tenors are not supposed to sound like loud character tenors. If that is what you are expecting you need to examine your musical prejudices and filters. Voices like his are rare. His way of singing mirrors Caruso.
In the past, there was the second part of this video on RU-vid where he was demonstrating how to sing “la speranza” :) Would it be possible to find it?
I think Vladimir's vibrato sounds too manufactured and a bit too slow. It sounds like he is pushing the chest voice to sound bigger and that is afecting the vibrato speed.
Luifernal el vibrato se hace con las cuerdas vocales, y cuando se ejerce demasiada presion subglotica la cuerdas vocales pierden flexibilidad lo que hace que el vibrato sea mas lento. No entiendo lo que has dicho, ni creo que tenga ningun significado.