Do you have a source for that video?
No, I saw it on the news. Don’t recall if it was local or network. One of the witnesses in the news report at the link above said the gorilla was throwing the boy 10 feet in the air.
This is the link I mentioned:
http://www.wcpo.com/news/local-news/hamilton-county/cincinnati/gorilla-attacked-child-who-fell-into-zoo-exhibit-child-hospitalized