In one video, it drives the buggy over to its owner to see what food he was eating. Even parrots are nosy about what people are eating from watching several of my friends' birds, like cats and dogs. They end up yelping when they see you eating until you give them something special to eat too.

There's other observations as mentioned, but that one seems to show the parrot has a goal in mind when he's moving it.

See my other comment here. If you watch the linked video, the bird shows cognitive obstacle avoidance, navigation along lines and on a preferred narrow path, and more. Definitely a "goal" in mind, not random movements.