Actually, it’s not about Cows at all but about the cute „Nao“ Robots, dancing.
https://youtube.com/watch?v=4t1NWH6G1f0%3Fhl%3Den%26fs%3D1%26autoplay%3D1
Now, „Nao“ sounds like a Japanese idea of a name but, they’re actually from a french company, which explains why they’re dancing in the french pavilion.