on vidio How the 3 Position Selector Switch Works

In this video explains how the selector switch with 3 positions,
where is the contact position 0, 1 and 2
if the selector switch shows the position of the number 0 then the position of the numbers 1 and 2 is OFF
if the selector switch shows number 1 then position 1 is ON and position 2 is OFF, then if the selector switch shows number 2 then position number 2 is ON and position number 1 is OFF.
 

In this video explains how the selector switch with 3 positions,
where is the contact position 0, 1 and 2
if the selector switch shows the position of the number 0 then the position of the numbers 1 and 2 is OFF
if the selector switch shows number 1 then position 1 is ON and position 2 is OFF, then if the selector switch shows number 2 then position number 2 is ON and position number 1 is OFF.