There are stilts for people who work in construction sites on ceilings. You stand in them and they strap around your legs. So the concept isn't new.
If you look carefully at where her foot is, watch that as she walks, you'll see how pointless the whole exercise is. She gains height, but I really see no other advantage. I suppose strides would be longer, but then the swinging of the legs with each step would be slower.
But it is funny, the second set especially.