With regard to the film, see the explanation below the following paragraph.
START There is a metaphorical meaning of: go down a street or road. It is an idiom that means we've already dealt or discussed this situation before. We've experienced whatever it is before. We have "traveled this distance before". END
However, in real life, on a real road, it's depends on your vantage point (the have been part is the same):
have been + up+ OR down the street.
There are tons of these in English: have been around the town, have driven around the Washington, DC beltway. Or around the London Ring road. Have flown across the US. etc. etc.
In English, depending on how you view a street, your opinion of the street (or avenue or road) you are on, it can be up or down.
Let's take an easy example:
If you are at the beginning of a street like the Champs Elysées in Paris at the Arc de Triomphe, going towards the Place de la Concorde, you would say "down the avenue". If on the other hand, you are at Place de la Concorde and will go along the Champs Elysées towards the Arc de Triomphe, you would say "up the avenue." The blue line is the Champs Elysées.
Though up and down is often relative, in this case, up would facing North and down would be facing South, which you would know, if you know Paris at all, basically.
Now, go to a street could be anywhere along the street. Whereas if walking or driving or cycling (moving), you would tend to say up or down to mean travel along that street in some direction. Sometimes, up or down is not really scientific. It's a matter of perception. Sometimes, it isn't.
If I walk down Fifth Avenue in New York City, and go in the direction of the cross-streets as they go down (53rd, to 52nd, to 51st and so on), it is down. The opposite would be walk up Fifth Avenue.