A bus schedule doesn't give you what you see in that video. That video shows you the bus is arriving, not when the bus was scheduled to arrive. To show those things it needs to know where you are and where the bus is.

Same with the supermarket. It shows you what's actually in front of you, not what some stocker claimed was there when they put stocked the shelf 6 to 72 hours ago.

Other examples would include ads on stores. Your device can't show all ads simultaneously nor can it download all of them at once. Too much data. What it can do is ask each store for it's ad at the moment you get near but now you've just told the store you're near. Even near would be too much data though, looking down a busy shopping street or a a mall. It would likely only download what you look at and now the store knows what you looked.