Sounds like this spread through pet and meme soundboards, where short animal clips that seem to speak human words are shared as reaction audio. The pug yes yes yes yes clip fits that pattern, built entirely around the illusion that the dog is answering enthusiastically. It has no clear single source work behind it, so its life online is defined by reuse rather than a film or show. Creators keep returning to it because agreement, excitement and cuteness are all delivered in a few seconds.