Where is the best thread making video featuring correct method?

there is a very famous german television show for children - and one of their movies shows very precisely how screws are made:

the thread is pressed into the rod.
this will also lead to more strength instead of cutting the thread.
…this means the final ending of the cut / helix - V-shape is given by this mechanical process.

link to the other already very elaborated topic about nuts…

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