The DW website posted another version of their video on 19th March 2024 (their original was posted on 7th February 2024). The new version mostly uses the same video footage, but edited slightly differently - and with a different commentary.
This time they don't mention "killing the hedgehog", but still translate Ernest talking about collecting stones to make magnets. As for how this is supposed to work, the narrator just vaguely mentions "thermodynamic principles".
Note that the DW footage seems to have been shot before the VOA video, and there are quite a few differences in the equipment. There is no tin-roofed adobe shed, and the bicycle wheel is mounted on a much taller pole. There is also an old fan strapped to a crossbar near the wheel.
n.b. Old BLDC fan motors, with dead driver circuits, can be wired as multi phase AC generators. But if this is meant to catch the wind, to turn, then it is not particularly well mounted - as the airflow is partly blocked by the crossbar.