Slow Parent

4.  Select camera and cube
  • 3D View
     
  • Select camera (the child)
     
  • Hold Shift key down
     
  • Select cube (the parent)
     
  • Release Shift key
5.  Parent camera to cube
  • 3D View menu >> Object >> Parent >> Object

  • Set Parent To >> Object

6. Enable Slow Parent
  • 3D View window >> Select camera (the child)

  • Properties menu >> Object button >> Relations Extras tab >> Slow Parent checkbox