This video was a good find by that guy. Cora's basically saying Beltran brought some "stuff" to the 2019 yankees that they didn't have before, that improved their offense. Although notably he specifically said "not devices". Who knows what to make of this but have to be pretty skeptical of a team that Beltran was just tied to.. Yankees aren't out of the woods.
Do you listen to R2C2? Beltran is phenomenally gifted and smart, and has loads to share without cheating. One thing comes to mind: he taught Didi that as a lefty facing a lefty if it looks like a ball, it's a strike and vice versa. Didi said his performance after Beltran improved dramatically. Beltran was a switch hitter, never faced a lefty as a left. There were many other instances told by players. The guy's baseball smarts are off the charts.
But yes, the Yankees were named, and I think all teams cheated to an extent. I doubt though it came to the level of sending messages in realtime like the Astros did and the Red Sox with the Apple watches. I think that's why Cashman reported the watches thing, because he was confident the Yankees wouldn't get busted on something similar.