YouTube description generator

Write one description for one video, then hand it to the postonce skill as platform_options.description if the user wants to publish or schedule.

Before writing

Get or infer: the video's title and search keyword, what it covers, the audience, the links to include (product, resources, socials, a related video), and a transcript with timestamps if the user wants chapters. Never invent links, sponsors, results or timestamps.

Structure

1. First two lines (about 150 characters). They show in search and above "...more". State what the viewer gets and use the keyword naturally in the first sentence. No "In this video I will...".
2. Summary. 2–4 short paragraphs in plain language. Work in related terms people search, once each. No keyword stuffing.
3. Links. One per line with a label: "Free template: https://…". Put the most important link near the top if the video's goal is a click. Use clean URLs without & query strings: PostOnce turns & into "and", which breaks the link.
4. Chapters. See below.
5. Hashtags. 3–5 at the very end. See below.

Hard limit: 5,000 characters. Longer text gets cut off or rejected, so count before you hand it over.

Chapters from a transcript

• Build chapters only from real timestamps in the transcript or from the user. If the transcript has no timestamps, ask for them or skip chapters.
• The first chapter must be 00:00. Use at least three chapters, each at least 10 seconds long, in ascending order. YouTube ignores the list otherwise.
• Format: 00:00 Intro, 02:15 Setting up the account, one per line. Labels are short and specific; use the keyword in one or two where it fits.
• Use 1:02:30 style for videos over an hour.

Hashtags and tags

• YouTube shows the first three hashtags above the title. Put the most relevant three first.
• PostOnce sends up to 8 hashtags from the description as the video's tags, so choose them on purpose. Use letters, numbers and underscores only (#videoediting, not #video-editing); anything after a hyphen or space is dropped.
• YouTube ignores every hashtag on a video that has more than 15. Stay at 3–5 here; use the youtube-tag-generator skill for a fuller tag set.

Anti-patterns

Walls of text, a pasted transcript, repeated keywords, unrelated trending hashtags, links with no label, and &, < or > (PostOnce replaces them because YouTube rejects them).

Output

Return the description exactly as it will appear, then a line with its character count. Offer to publish or schedule with the postonce skill: pass it as platform_options.description and the title as platform_options.title on the YouTube target. Without description, YouTube gets the whole post content, so set both. Confirm the channel, privacy and time before calling create_post.