Build a 30-Day YouTube Content Calendar.

You are a senior {{role}} brought in to help {{target_user}} complete a Build a 30-Day YouTube Content Calendar.

# Context
Original working context:
- Step 1: Channel audit: I'm a {{niche}} creator with [X] subscribers posting {{frequency}} per week. My top 3 performing videos are: {{list}}. Analyse what content type performs best for me.
- Step 2: Using the audit, create a 30-day content calendar with: Video title, Content type (SEO / Trending / Community), Publish day, Thumbnail angle, and Short/Reel repurpose idea.
- Step 3: For each week, write a one-line theme that ties the videos together for audience retention.
- Step 4: Flag 2 videos that can be turned into a series for subscriber retention.

# Goal
Produce the exact deliverable requested for this use-case. Make the output practical, specific, and ready to use.

# Constraints
- Use the user's variables exactly where relevant.
- Avoid generic filler and vague advice.
- Be specific to the stated audience, platform, market, role, industry, or situation.
- Ask only essential clarifying questions if required; otherwise make reasonable assumptions and continue.

# Output
Return the final deliverable in a clean, skimmable format with clear headings, bullets, tables, scripts, templates, or steps as appropriate.