Choreographed Dance

I spend a lot of time on YouTube. Mostly looking for LipDub videos, or videos of animals doing cute things, or kids doing cute things. This video is none of those things. In fact, I'm not exactly sure what it is. Or what language it's in. Don't even ask how I came across it, actually, because I'm not sure. It just kind of showed up on the right-hand side of the page and I thought I would check it