Sickle: which one to choose, hammer sharpening, strengthening and technique of use

Sickle: which one to choose, hammer sharpening, strengthening and technique of use
This contribution aims to be the most comprehensive on TH-cam for all those who intend to switch to traditional mowing.
Which scythe to choose? How to sharpen it with a hammer and hammer? How to upgrade the blade housing? How to cut with the scythe following the traditional technique that allows you to obtain a clean and fast cut? A useful suggestion to all municipal administrations who intend to give an ecological footprint to the maintenance of urban green.