This beast is called the BigDog quadruped robot, and is a walking robot meant for military purposes.
Now, the incredible thing isn’t that it is a walking robot, walking robots have existed at least for a decade. The incredible thing is the extreme precision at which it handles balance. That is what makes it seem so alive.
But I admit, it feels kind of freaky with that noise (Which sounds like a cry) and the two “horns” (Which are probably accelerometers)