So in this video the idea is that you have a girlfriend, and she asked you to pay for her dancing classes, but you didn't want to, because it's just another pain in the ass. But you are a good boyfriend and you signed up to it. And now you have to pick her up after her classes. One day coming to the dance studio to pick up your girlfriend home, she was stuck is in the bathroom taking shower and changing. 
And then you asked a dancing instructor Amber what kind of dances are they learning here. So the instructor is deciding to show you what you're paying your money for...

MMM... Very sexy...

So sensual..

Maybe letting your GF to attend these dancing classes wasn't that bad of an idea...