My older daughter works in a software company to make a program to administer collections of videos, lots of videos. In particular a small part is a feature to upload some videos to YouTube using the API. A few years ago, when we told that to my younger daughter, she understood that her sister worked in YouTube. The younger one was extremely happy and and full of admiration. Even if my older daughter gets a Nobel price, she will not reach the same level in the appreciation scale.

I'm not sure how to apply this to your talk, specially because they are older children, but ensure to explain that some guys/gals like you make YouTube work.