About this scene
Parking lot, parked car, driver window down. She's in glasses, mid-twenties, holding her phone with maps open. She walks up asking for directions. He gives them to her. Mid-sentence she clocks the flash. She finishes giving the directions, but she gives them wrong on purpose. She knows the area. She is intentionally extending the conversation by sending him in the wrong direction so she has a reason to keep standing at the window.
What to watch for
The deliberate wrong directions are the entire video. She mentions the wrong street name twice, once with confidence and once with a pause. The pause is the tell. She is making it up so she can keep talking. Her right hand keeps the phone up like she's checking the map but the screen has not changed in two minutes. After he eventually drives off she stands in place for ten more seconds, then her phone goes in her bag and she walks off without consulting it.