Sorry friends in the video there is right(alt+shift) to on mouse keys instead left(alt +shift)
LEFT Alt + LEFT Shift + Num Lock = on/of mouse keys
Numpad keys;
Move cursor
1=down left
2=down
3=down right
4=right
6=left
7=up left
8=up
9=up right
Drag button
0=depress
.=release
Select button
/=select left button
-=select right btton
*=select modifier button
Click
5=single click
+=double click