No confirmed original source is widely documented for this clip, and the 2x in its title points to its format rather than a known scene: the same cha nanana chant is simply played twice in one file. That doubled version is the one that circulates on soundboards and in short-form edits, where a longer, repeatable hook is easier to drop over a reaction or transition than a very brief fragment. Its appeal is practical rather than nostalgic, since the catchy, wordless bounce works across languages and needs no context to land.