Beyond 800 words: new digital story formats for news
The 800-word article is still the dominant form of online news from most publishers. This largely seems to be a legacy from printed newspapers and to a lesser extent this is true for online news video online too, with much of it still produced in traditional made-for-TV formats albeit shorter.
https://medium.com/bbc-news-labs/beyond-800-words-new-digital-story-formats-for-news-ab9b2a2d0e0d