First thing you want to take notice of is the size of her crate. Even if she is a large breed dog, you do not want to put her in a large sized crate while she's a puppy. It's just simply too big.
A good rule of thumb to remember is that it should accomodate your puppy comfortably, but it still should not be much bigger than allowing her to stand up and turn herself around.
I did try the video recorder three times when I had her caged. All three times were times when she did not leave me any surprises in the cage.
I don't think is quite what LuckyPenny was referring to - when you video taped her, regardless of whether or not she soiled her cage, was she experiencing any type of behavioral anxiety?