Do you have a funky little foot that looks all stubby like the front is missing? If so, you might have a button foot which will definitely help you when sewing many buttons all at once. Don't sew buttons on by hand, try the button hole foot. If you'd like to purchase one here's an inexpensive one on Amazon.
My video cuts off at the end before I get to finish my sentence (my battery died) but all I did was cut the threads off the button.
top photo: ahisgett