Learning the basics or the grammar of video photography (videography) is important to helping you tell your stories better. According to Atomic Learning:
Good writing is composed of well-chosen words, combined into thoughtful sentences and logically organized paragraphs. Good video follows a similar structure.
Atomic Learning is a subscription service but they do offer this free preview of their Video Storytelling Guide that covers basic video composition rules. Also, check out their Composing Basic Camera Shots and view short videos that demonstrate the concepts discussed.
Another good resource for learning how to compose better video shots is the book: Setting up your shots : great camera moves every filmmaker should know.