This short film is a mockumentary of 1970s Australian Cinema.
To parody 70s Australian cinema, arguably this film's film-within-a-film, "Weekend of Summer Last" title was created from an amalgam of at least three keywords ("last", "weekend", and "summer") from such then recent late 1970s Australian films: "Weekend" : Long Weekend (1978) and/or Weekend of Shadows (1978); "Last" : The Last Wave (1977) and/or The Last of the Knucklemen (1979) but probably not The Last Tasmanian (1978); and "Summer" : any or all of Summerfield (1977), Summer City (1977), and Summer of Secrets (1976).
The name of the film that was being made was "Weekend of Summer Last".