Lion Brand Yarn has a YouTube channel (http://www.youtube.com/lionbrandyarn) with about ten different knitting technique videos, and more to come. The videos are all less than a minute long, but very informative. I was excited to find this because other channels that have videos are sometimes hard to view. However, these videos are simple and easy to find.
The techniques that they currently showcase are all simple stitches, increases, and decreases. Hopefully as they add more videos there will be more complicated stitches, etc.
Here are a couple of examples: