We've had car on the Baikal lake ice already here. This is something alike, but different. This is the same place, but at night with some artificial illumination planted beneath the ice. I don't recall seeing something like this before. So here is the story, told by the authors:
"We didn't know if we would be able to illuminate the car thru the one meter (3 feet) thick ice. However we decided to give it a try..."