You know what is creepy? Youtube gives you granular analytics data such that you not only know how many people are watching your videos, it also tells you at what point people STOP watching your videos. So you can actually have a graph of which bits are more or less interesting to people, or how many people immediately stop watching your video because they are like BLUERGH HIPSTER HAIR.
I am trying to work on making the videos more concise. I just made a 5/6 minute XB800 video but honestly that's because there wasn't much to say about them.