It is definitely worth the effort. Lots of people are v-blogging their daily lives on YouTube and making a living off of it. I value my privacy and would never do that sort of thing.
However, I do make a few video tutorials now and then and I do earn from them. The key is getting a lot of views and/or subscribers. Also, if you come up with a viral video you can make a lot off of that one video.
Personally, for the little bit that I've done, I earn anywhere from $5 up to $10+ a month. It fluctuates from month to month because videos just like written articles are affected by Google's constant algorithm changes.
I think you should go for it. You can make as much money as the amount of work you put into it. I understand you can make more if you are in front of the camera, but you can also make money if you just do computer screen video tutorials too.