It's commonly called a pipa toad and it lives in the Amazon. The eggs get embedded in the mother's back during sex and stay there until that whole unattractive business we just witnessed. I made my mother watch a film of that about 15 years ago, and she still almost vomits if I mention it.
At this time of Delivery of Babies holes in skin are bigger imagine the first time when this frog got pregnant... How Painful experience that might be....
Just imagine if something comes out of your skin... Isshhh this imagination is worst.....
Like L3ggy said, it's not disgusting, it's fascinating. It's really no more disgusting than human child birth. The only difference is the place from where the offspring emerge.