How to summarize a YouTube video with Claude

A two-hour podcast in ninety seconds of reading, with timestamps you can check. Claude writes excellent summaries; the only real work is getting the transcript to it. Here's the full workflow.

Step 1: Get the transcript into Claude

Claude can't watch video, so the transcript is the raw material. You can copy it manually from YouTube's transcript panel (full instructions here), or use the YouTube Transcript to Claude extension to send it over in one click, formatted, timestamped, and filed into a project.

Step 2: Ask for the right kind of summary

"Summarize this" produces a generic paragraph. These prompts produce summaries you'll actually use:

• Executive summary: "Summarize this video in 5 bullet points, then list every concrete number, statistic, or claim it makes, with timestamps."
• Decision extract: "What does the speaker recommend doing, in order? Include the reasoning behind each recommendation."
• Skeptical read: "List the video's main claims and rate how well each is supported by evidence given in the video itself."
• Study notes: "Turn this lecture into structured notes with headings, key terms bolded, and a self-test quiz at the end."

Step 3: Verify with timestamps

Summaries are only useful if you can trust them. Transcripts added by the extension carry a [m:ss] timestamp every ~30 seconds, and Claude uses them when quoting, so when a summary says the speaker claimed something at [42:10], you can jump straight there and check.

Summarizing more than one video

This is where projects shine. Add five videos on the same topic to one Claude project and ask: "Across all five talks, where do the speakers agree, where do they contradict each other, and who has the strongest evidence?" That's a synthesis no single-video summarizer can produce. Setup takes five clicks, see adding YouTube videos to a Claude project.