Kong long is the Mandarin reading of the Chinese characters for dinosaur, which explains the simple title attached to this very short clip online. No specific film, game or show source is reliably tied to the sound, so its life is mostly on soundboards and in short form edits where a labelled, instant dinosaur cue is useful. Creators search for it by its pinyin name or by dinosaur roar, save the tiny file, and reuse it whenever a prehistoric joke needs a sound that lands faster than an explanation ever could possibly do.