This crow is 100% fucking around for no reason other than to fuck around. Birds have two main gaits depending on where they live - they put one foot in front of the other if they live on the ground, or they hop if they live in the trees. Crows live on the ground, and thus walk. They have no reason to hop like this, and they aren’t wired or built to move like this naturally. They might hop to quickly avoid danger that’s very limited, like a car tire coming at them, or to get up onto the curb, but this sort of motion has no purpose other than being fun.