Place this clip at the very start of your edit, before your headline text or talking head appears. Follow a mock-serious reveal later in the same video with the Law and Order Dun Dun to mark the verdict, keeping this intro only for the opening segment.
Über diesen Sound
This is a 2.5-second excerpt of the intro theme from The MacNeil/Lehrer NewsHour, built around a formal news programme musical sting. It feels authoritative and dead serious, which makes even a tiny announcement sound like a major bulletin the moment it plays.