I do seem to enjoy making boring videos and this one is no exception!
Typical pressure cookers allow you to raise the pressure to about twice atmospheric pressure (~1013 hPa) inside the vessel. This brings the cooking temperature up to about 120 ºC and lets you cook food (such as dry beans) much more quickly. Once you get over your fear of the thing that is. Sitting there, hissing at you, building up pressure inside. Makes me a bit nervous every time. We were making a sort of feijoada this time (Basically, it’s pork and beans, but yummy pork and beans! –http://en.wikipedia.org/wiki/Feijoada)
source
