I've had great results with videos.
Now, personally, I'm more of a writer, so I can easily crank out 10-15 articles in a very short period of time.
When it comes to video, I tend to procrastinate.
So I always go for articles first, and then video, because I want to get something out there :)
But you're right. Lots of people prefer to watch a video rather than to read an article.