EDIT: Change of plans! As I've received lots of questions, and shooting and editing videos is time-consuming, I'll be answering your questions in the comments thread below, instead of in a separate video.

EDIT 2: I haven't been able to reply to a few of you, I think it's because you're not on Google+. If I don't answer your question that's probably why.

I just hit 4000 subscribers! Thank you to everyone for all of your support. To "celebrate" I'm hosting a question and answer session. If you have a question you'd like me to answer, post it in the comments below. In a couple of weeks, once everyone has had a chance to ask their questions, I'll post another video answering everyone's questions.