Repurpose a YouTube Video Into a Blog Post Using Claude

Turn any YouTube video or long-form recording into a high-quality, SEO-ready blog post using Claude's long-context capabilities—without it reading like a transcript dump.

Prerequisites

• Claude.ai account (free or Pro)
• A video transcript (from Descript, YouTube auto-captions, or Castmagic)
• A target keyword or topic angle for the blog post

Step 1: Get the transcript

Option A – YouTube auto-captions: On your YouTube video, click the three dots below the video → Show transcript → Select all text → Copy. Paste into a text file and clean up the speaker cues (no need to fix every word—just readable).

Option B – Descript: Open your project in Descript → Transcript panel → Export transcript → Plain text.

Option C – Castmagic: Upload the video and use the plain transcript output.

For a 15-30 minute video, the transcript will be 3,000-6,000 words. Claude handles this comfortably—paste the full thing.

Step 2: Define the blog post angle

The worst AI-repurposed blog posts are just transcript dumps with paragraph breaks. The best ones take the ideas from the video and restructure them for a reader, not a viewer.

Before prompting, decide:

• What's the blog post title? (Can be different from the video title)
• Who is the reader? (Same as your viewer? A different person who'd find this via search?)
• What's the primary keyword you want this post to rank for?

Example: Video title = "My favorite productivity hacks I've used for 5 years." Blog post angle = "5 Productivity Systems That Actually Stick (With Real Examples)."

Step 3: Write the system prompt

Open Claude.ai. Paste this as your opening message:

"I'm going to give you a transcript from a YouTube video. Your task is to turn it into a blog post—not a transcript, a real article. Here's what that means: restructure the ideas with clear headers, cut all the spoken filler ('um,' 'like,' 'you know,' 'so'), write in the third person where it makes the content stronger, add any natural context that was implied but not stated, and produce something a reader would enjoy reading without having seen the video.

Target keyword: [your keyword] Target reader: [describe them in one sentence] Desired word count: 1,200-1,500 words Tone: [conversational / professional / technical / etc.]

Here's the transcript: [PASTE TRANSCRIPT]"

Step 4: Review the first draft

Claude's first draft will be structurally solid but will need:

• Voice adjustment: It'll write in a generic smart-professional tone. Add your phrases, your specific examples, your analogies.
• Fact check: If the video included statistics, check them. Claude can't verify facts—it just repeats what was in the transcript.
• SEO check: Does the target keyword appear in: the title, the first paragraph, at least 2 headers, naturally 3-5 times in the body?

Step 5: Iterate with follow-up prompts

Don't rewrite manually for everything. Ask Claude to do specific fixes:

"The intro is too generic. Rewrite it starting with a surprising statistic or counterintuitive claim about [topic]."

"The section on [X] is too long. Tighten it to 150 words while keeping the key points."

"Add a comparison table for [the options discussed in section 3]."

"Write a TL;DR box (5 bullet points) to put at the top of the article."

Step 6: Add what the video had, the transcript didn't

The blog post is missing visual elements from the video. Add:

• A screenshot or graphic at a relevant point
• A pull quote box for the best line
• An embedded YouTube video at the top (embed your original video—readers can watch or read)
• Internal links to related posts on your site

Publishing Checklist

• Title includes target keyword
• First 100 words mention the keyword naturally
• At least one image with alt text
• Meta description written (150-160 characters)
• Internal link to 1-2 other posts on your site
• External link to 1-2 credible sources mentioned
• YouTube video embedded
• CTA at the bottom (subscribe, download, watch next)