I can only speak for myself, but where I work, it's near impossible to watch a video without looking like you're not working. Additionally, I can't copy/paste code from a video or quickly skim to see if it's what I want.
I think short, concise, and targeted posts are the way to go. Something "like" this tutorialzine.com/2010/10/css3-animated-bubble-but… (link is just to demonstrate post length, content, etc, I only skimmed it so I have no say about the quality of the code, etc.)