Let’s talk about why it looks fake.
I think it comes from the use of hydraulics. Biological muscle is way less linear (it works more like a second-order control system, where things often overshoot their target before dampening).
But one part of it may also be algorithmic: the robot’s Kalman filter (?) may correct for errors from sensor fusion much faster than a human would.
I would love a more informed opinion than mine though.
Watch the reflections on the plexiglass while they are moving. Obviously they could have been composited in but there's definitely a live portion of the shot.
I don't think "basic" is the right word.
So it is "animation" of a physical sort designed to make it look like the robots are responding to the music naturally, rather than programmatically.
On a dancing person you see all the slight adjustments to keep balance that make it feel natural, I believe these robots do it too fast for us to notice and so it seems like CGI where keeping balance isn't a thing.
Look at the pelvis movements at 1:15 to 1:25! You can clearly see it jerking around so the robot keeps its balance.
None of those movements are smooth or fluid, it's all jerky jittery and unnatural, which is exactly what you'd expect from actual robots. If it was motion-capture, you wouldn't get those movements, you'd get smooth human movements instead?
I'm so fascinated by how this video triggers people's "it's fake!" senses, when it's clearly real.
This is how the robot moves IN REALITY: https://www.youtube.com/watch?v=uhND7Mvp3f4
In that video you linked, look at second 21/22, when it raises the arms in the air: the way the arms stop instantly is very inhuman.
Almost as though they had to edit out some balance-assisting device.
Also: why are the people at the right speed, but it feels like the robots are sped up? Them being sped up would be fine, but if the two are at different speeds then it’s a clear indicator that it’s composited.