What message is the film presenting about technology? What losses and gains are described? Who or what has ‘agency? in this film (AGENCY In sociology and philosophy, agency is the capacity of an agent (a person or other entity, human or any living being in general, or soul–consciousness in religion) to act in a world. The capacity to act does not at first imply a specific moral dimension to the ability to make the choice to act, and moral agency is therefore a distinct concept. In sociology, an agent is an individual engaging with the social structure. Notably, though, the primacy of social structure vs. individual capacity with regard to persons’ actions is debated within sociology. This debate concerns, at least partly, the level of reflexivity an agent may possess) Source: Wikipedia (not recommended, but useful shortcut)
One imagines “Free as a bird” as having “real” agency, but the film is merely a subjective slant of portrayal with an imaginary utopian world where the bird has no predators. Yet the human sphere is portrayed as regular, ritualistic routine to evoke dystopian feelings for environment and persona.
The main message is one of monotony, via technology.
As for losses and gains; Nature is an intrusion e.g. sunlight and blind, bird breaking a cable to build it’s nest and bird flying into the window.