The footage is from the 1982 animated version of Treasure Island produced by Kievnauchfilm .
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 . FlatScornfulDodo.mp4
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 footage is from the 1982 animated version
Search for "Dr. Livesey Walk Full" or "Why Not Phonk Treasure Island." which is a "Phonk" style song.
The "full piece" usually refers to the edit synced to the track "Why Not" by Ghostface Playa , which is a "Phonk" style song.