The "full piece" usually refers to the edit synced to the track "Why Not" by Ghostface Playa , which is a "Phonk" style song.
The footage is from the 1982 animated version of Treasure Island produced by Kievnauchfilm . FlatScornfulDodo.mp4
"FlatScornfulDodo" is a randomly generated URL string from the site Gfycat (similar to how Twitch clips or Imgur links are named). It became the "canonical" name for this specific high-definition crop of the walking animation. Where to Watch The "full piece" usually refers to the edit
The specific "full piece" you are likely looking for is the (also known as the "Why Not" meme), where the character and his crew walk toward the camera with an exaggerated, rhythmic gait. Origins and Context rhythmic gait. Origins and Context