I have a confession to make.
I have watched a particular kind of video ever since I was in high school. Since I was a homeschooled student, this kind of video provided me with a particular kind of education I never would otherwise have received. Even public schooled students don't often watch these kinds of videos and I know most of my friends didn't--and don't--engage in watching them. Some do, however.
Actually, to be quite honest about it, you don't just watch these videos passively. You also participate in them via physical action. I know for sure that had I not been exposed to these videos, I would not know how to perform the kinds of physical actions they portray. In fact, I'm quite an expert in them now; it's almost second nature.
I still put on these videos fairly often. I sometimes wait until no one is around, because I don't want to disturb my housemates. Other times, I just put the volume low and hope no one will notice. I have my favorites that I'll go back to over and over.
By now it should be clear what kind of video I mean. Clearly, I am adept and well-versed in exercise videos!