If you make a v-blog about flying I would suggest you stick to talking about your own flights and experiences rather than trying to make how-to guides for other people. I'm not sure it would be particularly useful to talk about maneouvres because flying isn't something you can learn just from watching videos. I also have a feeling it would be considered irresponsible to try and make instructional videos on flying.
You don't need to worry about doing things wrong. You weren't given a license by accident, so you should be generally competent. If you make mistakes (like everyone does) then that can just be another thing to talk about (or you can edit out the bad bits if you just want to look like a sky-god!
).
For recording have a look at the NFlightcam+. It has a pass through adaptor to plug into the headset jacks for audio and it has a built in GPS. It's not cheap though.