Complex sentence: The film depicts a young boy, who in this brief film becomes a young man, is seen looking out the window toward the sea, then near a harbor, walking on a pier, then gazing from the rails of a small ship.
Split into simpler sentences: The film depicts a young boy, who in this short film becomes a young man. He is seen looking out the window toward the sea, then near a harbor, walking on a pier, then gazing from the rails of a small ship.