From an Ars Technica article entitled YouTube University gets failing grade from prof, students. The original analysis is here

Juhasz breaks the issues down into a set of what she refers to as “binaries”—tensions between opposites that have to be balanced for proper teaching.

Those binaries were:

  1. Public/Private
  2. Aural/Visual
  3. Body/Digital
  4. Amateur/Expert
  5. Entertainment/Education
  6. Control/Chaos