Enjoy! https://youtu.be/KtIQklKnIf0?t=43

Can somebody translate this for me? I'm curious what the setup is and why she's so happy.

It's from Sefi Rivlin's variety comedy show "Mochash":

https://www.youtube.com/watch?v=hBMiCqT8K0Q

As I understand it, Sefi Rivlin introduces his male and female assistants, and lectures them (with live demonstrations) about usage of pies and cakes in slapstick comedy.