The origin of this exact recording is not clear, and it circulates online mainly as a short soundboard clip named after the syllables being sung. Its appeal comes from the pattern itself, which is easy to recognise, quote and reuse without any context from a film or song. Short vocal riffs like this spread quickly in meme edits because they work context free, fit almost any build up, and can be dropped into vertical videos, gaming clips and reaction posts without needing explanation for the viewer watching.
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A short vocal clip chanting da dada dadada da da dada in a catchy rhythmic loop, used in memes and edits for a silly reveal, entrance or transition moment.
This clip is a person singing a simple tune out loud using only da syllables, repeating da dada dadada da da dada in a bouncy, marching rhythm. There is no music or backing track, just the voice keeping the beat and stressing certain notes so the pattern sticks in your head. It sounds playful rather than serious, like someone humming a grand entrance theme from memory and enjoying it too much. Listeners instantly get the joke, because the nonsense singing does all the work of building anticipation before a reveal, a fail or a proud moment.