the motor current set by SW1,2 , 3 and S1 depend on your motor
the one in the youtube video may not be the same as yours

if it has a partnumber that enables you to download the motors data sheet
it will make it easy

without the information I would start at about 1.5 A

the YOC335 switch 7 set to half current = the TB6560 S2 (stop current) set to 50%

with a 200 step/rev motor
the YOC335 pulse/rev = 1600 gives you 1600/200 micro steps = 8

so you need to set the TB6560 switches S3 & S4 to 8 (both to 1)

John