I use snap in bows on Bailey because I'm totally clueless on how to apply a bow with a band attached

Can anyone explain it to me? I want to buy some more nice boy bows. I watched a video that was posted, but I am not getting it..

Are you suppose to use a separate more stretchy band first and then add the bow over that? How do you apply the bow with out hurting the poor dog? I think I am the only one that doesn't know!