[leptons]

None of the videos you linked to show any robots actually walking.

[1] - the dragon is rolled around on a wheeled platform. There is one clip of a leg lifting, but none of it actually walking.

[2] - The Sultan's Elephant is moved around on wheels. It doesn't walk.

[3] - That thing is "skating" around on wheels, again not actually walking.

[4] - And yet another machine that doesn't walk but actually rolls around on treads.

[Animats]

No, the Zollner dragon really walks.[1] Very slowly, and only one foot is off the ground at a time. Top speed 1.5mph.

The wheeled platform is for transport.

[1] https://youtu.be/MwiPe76yfzk