Many readers of the linked article won't understand the meaning of "ground effect" and what role it plays in the video. It's possible to create a demonstration

Many readers of the linked article won't understand the meaning of "ground effect" and what role it plays in the video. It's possible to create a demonstration flying craft that can't ascend above the ground effect regime, but still create an impressive video. In short, if the video had shown ascent to an altitude of, say, 100 feet, I would be much more impressed.