Thanks for sharing. I don't know that Merlo is a massive guy like he describes, but the face def matches. And yeah, "Luca Vitale" sounds like a name someone would come up with in mob fan fiction.
While it would have been nice if he explicitly identified "Horse", Majuri sounds like the best candidate. He says Majuri was attempting to become official boss when Riggi died and it says "Milk" was going to continue on as his street boss if the changes were made. It also says Majuri was aligned with both "Milk" and Nigro, and we know from the Stango case that "Horse" was aligned with both of them.
We also know from the Stango case that "Horse" was part of the faction opposed to the Riggi faction, and this excerpt about Majuri lends itself to that. Either way Majuri seems to have been a top power in the family at the time.
Between this and the Stefanelli tapes, we also know Manny Riggi was taken off the shelf, was helping run the family circa 2010, and held the rank of captain in the mid-2010s. Be interesting to know when he became a captain again.