Jamie Condliffe captions the above video:

Shove a tray of dough into the oven and something magical happens: that raw mixture of ingredients is transformed into a delightful circle of deliciousness, a cookie. If you’ve ever wondered exactly what science was behind baking, though, this video explains. Zipping through everything from protein structures to the Maillard reaction, it explains some pretty complex chemistry very simply. Maybe go grab a cookie before you sit down and watch it?