YouTube title + description with SEO

Write the title + description for my YouTube video.

Topic: {{topic}}
Target viewer + the search query they'd type: {{viewer_search}}
Primary keyword: {{primary_keyword}}
Secondary keywords (2–3): {{secondary_keywords}}
The promise / payoff (one line): {{payoff}}
Channel name + niche: {{channel}}
What's in the description besides the summary: {{extras}} (e.g. timestamps, links, free download, sponsor)
What I want viewers to do after: {{cta}}

Return:
1. THREE TITLE OPTIONS (≤60 chars each, primary keyword in the first half). Each title takes a different angle: the search-keyword-led one, the curiosity one, the result-led one. Mark which one is most clickable + most searchable.
2. DESCRIPTION (≤350 words, formatted for YouTube): hook line, 60-word summary with keywords woven in, timestamps placeholder, extras, links, hashtags (3 max).
3. END-SCREEN CARD COPY (1 line each for: subscribe prompt, next video, free resource).
4. WHY THIS RANKS — 1 line on what about the title/description signals to YouTube's algorithm.

AU English. No clickbait. No ALL CAPS title.