That was outstanding! It immediately brings to mind those 1970s Sunday afternoons when my dad and grandfather would watch NFL games together, as they drank Pabst Blue Ribbon, which flowed like molten gold.
It also has an "Earth, Wind, and Fire/Ohio Players/Brothers Johnson" quality, to a lesser degree.
Not NFL, but it "could be." The opening gives off an early '70s NFL Films production.
Miami Dolphins '73: Greatness Once More Narrated by John Facenda.
"In 1973, Coach Don Shula and the Miami Dolphins had one purpose: to retain the Super Bowl championship for which they had worked so tenaciously the year before; in 1973, nothing would stand in their way."
