She's right about the Italy thing, sort of. But when the breed started, there was no Italy. There was Rome. And the Roman shepherds had these dogs they used as LGDs and drovers, and these dogs, wearing the shepherd's money around their necks, would accompany the shepherds and the flock on the tranhumance--and that's how they ended up in Germany. The Germans purchased/were given some of these dogs and turned them into cattle herders. But the original dogs would bite too high on the cattle and wreck expensive cuts of meat, so they started to breed them shorter--giving the Rotts we know today a rectangular rather than square build. Eventually, the new, cattle herder version of the original Roman dogs were named after the German town of Rottweil.
Or that's the story I learned in a Roman history class anyway.
Nevertheless, she isn't trying to recreate a Roman type; she's just trying to make money.