Strangest thing I have ever seen on my security camera

What you are seeing here was captured on my ceiling via my ip security camera. The round circle you see above is a ceiling light and the circle on the wall to the left is an old ceramic dish painting. Hopefully this explains orientation of the room. Now as to what was captured on video appears to be a shadowy figure, which moved around and has arms and fingers, it comes and goes randomly. I was not home at the time, but I am pretty freaked out about what I saw. I don't know what it is, this was captured at night time.