Why it worked
The video uses a simple, humorous visual gag of a dog's face superimposed onto various animals, which is inherently shareable and engaging. The rapid-fire presentation of different animals keeps the viewer entertained and curious about what will come next.
Summary
A dog's face is digitally superimposed onto various animal images, creating humorous and unexpected combinations. The video cycles through different animals, labeling each with its name, and ends with a playful "come back soon."