Start at 1:00 in. It's OK to laugh. Because she survives.
Actually, she doesn't just survive, in the accompanying YouTube commentary her mother says "my daughter is fine" and "she doesn't even have any bruises", and commands us all to "watch it and laugh now!"
If you say so, lady.
The game in question looks to be "Kinect Adventures". Most of the games included in the compilation title involve things like rafting, leaning and slapping balls. Balls. Not small, defenceless children.