A simple structure that works
- One or two sentences about the video. This is the part people see before “…more” and the part that helps YouTube understand the topic.
- Details. What's covered, who it's for, anything viewers need.
- Chapters if the video is long enough to benefit from them.
- Links to anything you mention.
- Hashtags at the end — a few relevant ones.
What a description can and can't do
A clear description helps viewers decide whether to watch and helps YouTube understand the topic. It won't make an unwatched video popular on its own. Write for people first, and use words your viewers would actually search for. To format chapters that YouTube recognises, use the timestamp generator.