The "full piece" usually refers to the edit synced to the track "Why Not" by Ghostface Playa , which is a "Phonk" style song.
"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 FlatScornfulDodo.mp4
The footage is from the 1982 animated version of Treasure Island produced by Kievnauchfilm . The "full piece" usually refers to the edit
Search for "Dr. Livesey Walk Full" or "Why Not Phonk Treasure Island." Where to Watch The footage is from the
Because this file is a widely shared internet artifact, you can find the "full piece" (the complete walking loop with the Phonk music) on most major video platforms:
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
The video file named is a well-known viral clip, most commonly recognized as a high-quality loop of the character Dr. Livesey from the 1982 Soviet animated film Treasure Island .