You see stuff like this a lot with Chinese videos. I recently saw an electric supercar type vehicle from them jump potholes automatically at high speed as if it was nothing. Just keeps driving with zero wobble or death after landing.

I thought the same. And watching the second video it's still impressive, but much more realistic.

Also, once solution to avoid having so many cables: the batteries last just enough for the promotional video.

this one looks much too “tidy” to be true: no tubes, cables etc.

You mean like this?
https://www.youtube.com/watch?v=YD9EaS3VRbc

Boston Dynamics used hydraulics, for their older generation bots, but AFAIK the new ones don't, so there is no tubing or wiring visible on new models.