The Fitcamx is the dash cam for people who hate visible dash cams: it replaces the trim cover behind the mirror, draws power from the factory harness plug, and looks like Lexus installed it.
This video shows the full process on a 2020 NX 300 — popping the trim without breaking clips, seating the camera, and confirming power-up. Total install time is under 30 minutes with zero wire routing.