Short: Plastic Bag
Plastic Bag, a first-person narrative from the perspective of a discarded grocery bag, is part of the FUTURESTATES series of shorts, which collectively ask "What will become of America in five, 25, or even 50 years from today?"
Directed by Ramin Bahrani, voiced by Werner Herzog. Be sure to check out the other ten FUTURESTATES shorts; I felt a particular affinity for this one, in part because the opening shot of The West Side is of one such piece of migrating polyethylene.