[Odd to say the least. It leapt like a cat.]
I noticed the same thing. At first, I thought it could just as easily be a cyote, we have lots of them here. But that tail, the bouny gate and the way it jumped....I doubt it to be anything but of the feline species. If it is a cougar or whatever, it may be feeding off a healthy diet of young deer.
Can you imagine deer hunting and having this thing walk by you? Think of the looks you get at camp. "I saw a couple of does and a trophy buck that I couldn't get a shot at. But man, you should have seen the mountain lion that walked under my tree stand."