Primary power source is you pedalling. ?Not quite perpetual motion.
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He means a dynamo in the front hub to power the lights (a bit of a step up from the wheel driven ones), and a gear box in rear hub.? All nice & neat, no derailleurs, no batteries.
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A lot of those rideshare bikes have a similar set-up.
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Shimano were making the 8-speed version a while back, though I haven¡¯t seen a hub geared bike for decades.? I¡¯ve not looked too closely at the rideshare ones, I should next time I see one.