It features a 3D model of a rat (sometimes identified as "Remy" from Ratatouille or a generic asset) performing a dance.
It is frequently used as a reaction video to represent being "locked in" or simply enjoying a moment of chaos.
The audio most commonly associated with this specific version is "It's My Life" by Bon Jovi , usually a high-pitched or distorted "Nightcore" remix. 🛁 Why is it a meme?
The combination of the stiff animation and the intense music creates "shitpost" energy.