Start with the actual circulating clip
The reference above is the tiptoe edit published by I Green Screen Things. It shows a small character in a dark patterned coat, with cuts between the upper body, face and shoes. A separate post by Green Screen Memes offers another green-screen edit of the same sequence. These are identifiable publication records, not proof of who created the underlying footage.
What the 1987 film credit establishes
The American Film Institute lists Rumpelstiltskin (1987), directed by David Irving, and credits Billy Barty in the title role. That verifies the film and the role. The catalog does not identify this social-media dance edit or connect its frames to a particular scene. A matching name in a search result is not a visual match.
Recognize which version you are watching
The checked versions cut between the upper body, a face close-up and the shoes. They are an edited sequence rather than one uninterrupted full-body shot. The comparison publication shows the circulating picture beside a green-screen version, but its “original” label does not identify an original creator or a film scene. No first-upload or original-creator claim is made here.