Bill Viola's 'Reasons for Knocking at an Empty House' is a video art installation focused on abstract themes of human experience and perception. The work does not contain any discernible LGBTQ+ characters or themes, as its artistic intent lies outside of social identity narratives.

Bill Viola's "Reasons for Knocking at an Empty House" is a video art piece depicting a man's solitary reactions to unseen sounds. The film focuses on themes of perception and isolation, and does not feature any identifiable transsexual characters or themes, resulting in a 'N/A' rating for its portrayal.

The movie does not contain any action or adventure elements.

Reasons for Knocking at an Empty House is an original experimental video art piece by Bill Viola. It does not feature characters adapted from prior source material, historical figures, or legacy characters from previous installments. Therefore, the concept of a gender swap, which requires a pre-established canonical gender, does not apply.

This experimental video art piece does not feature characters with pre-established canonical or historical races from source material, making the concept of a race swap inapplicable.