While vlog posts tend to be short, you can still pack a lot of work into one. At the Freevlog site, each instructional video begins with a graphics intro and theme music. It also ends with a similiar theme. The videos are cohesive.
You can learn fast with vlogging. Besides editing and compressing, I have to ask myself- "What do I focus on?". Does my content need to be looking at the big picture or my daily world?
So here's my compromise- I'll work on what I know best- myself and maybe from time to time stray off course do something documentary.