No, there’s nothing wrong.
The CVT’s in the Nissan cars you mentioned are belt driven and prone to failure from wear. That was covered in the video. You dodged a bullet.
No belts in this CVT design, just gears. But it’s just a prototype and hasn’t been proven in the real world yet. It hasn’t been put in a vehicle, tested for wear, torque stress on the gears, etc. But it looks promising, and it doesn’t seem all that complicated, at least to me...........................
Thanks - once it is a proven product, I’ll change my tune - but with complexity come a myriad of potential failure points...It’ll take a few years, after widespread production for it to prove itself. Until then, I’ll stick with more conventional transmissions - 8-9 gears and still durable for decent performance/mileage even with smaller engines.