Although presented as "the hymn of the Lombardo-Venetian Kingdom" by the uploader, it seems to really be the hymn of the Austian Empire ("The Habsburgs") of which it was non-voluntarily part of. I believe that our people, on a cultural level, "own" the two regional flags. The double-headed eagle symbol has some roots in Lombardy, and the other flag has the crests of both Lombardy and Venetia, with the Austian flag in the middle. There's one version without the Austrian flag.
As far as the hymn, part of me fancies it as almost like what the Bonnie Blue flag hymn was to the South. However, what would be a stretch. Intrinsically, it's a great hymn. It's very spirited, and neither too gaudy, nor too bland. It could be a symbol of the Germanic influence (Langobards, Goths, Cimbrians, Austrians) of the northeast; as opposed to the French Piedmont or Roman Tuscany. "Transalpine vs. Cisalpine" struggles have been part of our history going back to ancient times. I think at this point it transcends a historically simplistic "Germanophile" or "Germanophobe" outlook.
One strange factoid relating to the period of Habsburg rule, was that during the Kingdom of the Lombards many centuries earlier, the region of Lombardy, the Tri-Veneto area, and the Trentino was called "Austria." The country that the English-speaking world now calls Austria, is really named Österreich.