Keying in Blender -now working!

I finally figured out how to get the keying to work in blender! Here's the screenshot:

It's the same footage as before, just so I have something consistent to work with.
As you can see, I just plugged the mask into the keying node using an invert node and it worked. I had tried plugging the mask into the keying node, but hadn't gotten anything before, so I don't know why it didn't work before, but I have it working now!

I'll see if I can fix the mask in the next post. I'm not going to try to track the background.