This sound comes from Minecraft's wolf mob, which many players casually call the dog. Wolves were added to Minecraft in 2011, and their short bark became one of the game's recognizable creature sounds across videos, streams and memes. The clip keeps showing up because it is instantly identifiable even out of context and fits fast edits well. It is often used alongside other dog-related joke audio such as what da dog doin, but its appeal mostly comes from Minecraft nostalgia and simple reaction timing.