A talk given at CERN in the Summer Student Programme by me, on August 18, 2010. See also the CERN site on the event.
The talk focuses on a general introduction to calculating uncertainties, i.e. on what upy is about. It will not bore you with implementation details.
Clicking on the video after having started it will bring you to the original YouTube page in my channel.
When you are interested in how to code with upy, the upy Tutorial may be a good starting point, see also The upy uncertain ndarray: class undarray.