see screenshots and video, you can't miss it. These lights are high up on the skid supports near the body of the helicopter. They are only visible when the camera is between 30 and 40 meters from the helicopter and only when normal collision lights are set to OFF. The search light does not seem to be related.
on when collision lights set to off
flashing in reverse phase
visible between 34m and 40m away from the helicopter
only at night obviously