http://www.newgrounds.com/portal/view/574431

NG Mug: Click on the mug in corner when movie is ending
Happy Birthday: Watch the thing
Afro_Stud: You will see star with afro falling behind window. Click on it (it will happen aprox 30 secs after beggining of movie)
Coop: There will be car going behind window. Click on it
Dr Pepper: Devil will go from right to left, click on bottle of cola when he takes it