This is NOT the full video,
the full video has 4 useless minutes in the beginning..
and I was looking around in all the internet to understand how it works,
and I opened that video a lot of times ,
and i closed it ,

I thought that it does not talk about the differential,
but accidentally I discovered that it talks about it after 4 min, so I make this useful CUT..

the original full video link

[ Ссылка ]

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