I'm confused by your question. The video in question is an entity walking in a simulator and not real life? There's a world of difference between what can be achievable in a simulator, and how to transfer that simulator learning to the real world.
Real world is messy. Lowering the sim2real gap is challenging. The sim above doesn't model actuator dynamics, overheating, probably doesn't model inertia correctly, joint friction, delays, etc.
Real world is messy. Lowering the sim2real gap is challenging. The sim above doesn't model actuator dynamics, overheating, probably doesn't model inertia correctly, joint friction, delays, etc.