This film clip demonstrates to me a progression of increasing confidence in adapting to communication via the introduction of a new technology.
In the public sphere the couple could not make contact, possibly to social constraints and cultural expectations however much they longed for the contact. By a serendipidous moment of mistaken exchange they discover a relationship through the exchange of dialogue that initially develops through experimentation; to see what happens, then through exchange of gestures of communication such as the gifts and symbols (smiley icon)
As their confidence in use of the new technology grows ( gaining literacy) the communication grew to the exchange of questions between each other, each character constructing an alternative identity from the accummulation of artifacts sent through the communication system. The exchanges establishes a level of complexity and sophistication as they begin to play games over the media.
The formal identity of actual name comes last (but it could have been an alternative adopted identity an alter -ego).
Distopia occurs in the failure to be able to continue the relationship, as the characters had developed over-reliance on the stability of the technology. Also as their communication had failed to establish the basics of who they actually are, where are they located (which could still be an utopian anonyminity in other circumstances) before the system completely fails (by the tearing of the bag).
The technology has failed, important information had not been backed up, saved or established, so all seems lost until going back along the trail of breadcrumbs of the conversations and transactions ( returning to the original location) leads both characters back to the point where they first unintentionally met. The identification by the primary artefact (the red bag) becomes the indicator of all is not lost and the relationship can now begin in the real world and face to face.