WASHINGTON - For all of the things Bill O'Brien is supposed to be - CEO of Penn State football, offensive game plan strategizer, disciplinarian, fundraiser, etc. - sometimes his most obvious role is easy to overlook.

At his core, O'Brien is a teacher.

Before a tour stop on his Coaches Caravan last week, the first-year head coach explained his use of video, specifically through the XOS system, as a teaching tool.

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