explainer

/ɪkˈspleɪnər/
noun
  1. A short video, article, or piece of content that explains a topic in a simple, clear way.
    • The website posted a helpful explainer about how vaccines work.
    • I watched a five-minute explainer on the basics of cryptocurrency.
    • The teacher used an animated explainer to show the water cycle.
  2. A person who explains something, especially in a clear or detailed manner.
    • She is a great explainer and can make complex ideas easy to understand.
    • As an explainer of scientific concepts, he is very popular on social media.
    • The tour guide was a patient explainer of the museum's exhibits.