Maria Alandes Pradillo (Grid Information System expert) and Andrzej Nowak (CERN openlab CTO Office) explain in plain words the operations and the infrastructure at CERN in this video posted by Computerphile.  

If you are interested in learning more on how CERN handles the vast amounts of data generated by the LHC and the experiments’ detectors, we recommend you to watch this 5-minute video. Do not miss to learn more about CERN computing though; this video covers the History of computing at CERN, the role of the IT department, as well as the Data Centre and the challenges it faces.