A user can view their activity feed on their dashboard page.  

This feature requires tracking of the events of creating a video, updating an avatar, and
updating their bio.  So everytime one of these events are triggered, an activity is created.  
because since I'm using paperclip, I have to check and see if the picture was updated.
  Paperclip has 4 attributes, file_size, file_name, updated_at, and content_type...