Arduino-button_boxV2 please help.

I ive tried to follow the youtube video to build my own button box build went ok but when i have come to up load the sketch its stopping with the argument on line below

Joystick_ Joystick(JOYSTICK_DEFAULT_REPORT_ID,

With
'Joystick_'does not name a type: did you mean 'joystick'?

but on the line below is states

JOYSTICK_TYPE_JOYSTICK, 32, 0,

Please help this is all new to me

which Youtube video ?