documentary vs video

documentary

noun
  • A film, TV program, publication etc. which presents a social, political, scientific or historical subject in a factual or informative manner. 

adj
  • Of, related to, or based on documents. 

  • Which serves to document (record and:or illustrate) a subject. 

  • Presented objectively without the insertion of fictional matter. 

video

noun
  • Television, television show, movie. 

  • A short film clip, with or without audio (as in a music video, or one of the plethora of user-generated short movies on sites such as YouTube). 

  • Motion picture stored on VHS or some other format. 

verb
  • To visually record (activity, or a motion picture) in general, with or without sound. 

  • To record using a video camera, to videotape 

  • To record a television program 

How often have the words documentary and video occurred in a corpus of books? (source: Google Ngram Viewer )