What is a YouTube description generator?
A YouTube description generator is a tool that writes the text under a video. You describe the video, add keywords and pick a category, a call to action and a language. It writes a description that opens with what the video covers, works in your keywords and ends with the action you chose.
What should a YouTube video description include?
A first line or two that says what the video covers, since that's what shows before "more". Then a short summary with your main keywords, chapters with timestamps if the video is long, the links you mention, and one clear call to action.
Postel does the same for LinkedIn and X: it learns your voice, drafts posts from your notes and links, and schedules them.