Adding tuts code details
Merge remote-tracking branch 'origin/master'

* origin/master:
  Fix typo
  Fix typo
  Adding code steps
  Adding code steps
  Removing extra keys
  Removing extra keys
  Adding a few more free chapters
  Removing length, putting back some is_free
  Removing unneeded length, but putting back is_free (was an accident)
  Removing extra keys and adding code steps
  Adding finish code step
  Removing some extra keys
  added video keys
  added video keys
  added video key fiel
  Update metadata.yml
  added video key field
  added video keys
  added video keys
Removing duplicate config
Marking these videos as using the mov full video format