Step 1: Download the transcript

• Copy your YouTube video link.
• Go to downsub.com.
• Paste the link → download the .srt file.
• Rename the file extension from .srt to .txt.

Step 2: Open Notebook LLM

• Go to Source → Upload → Choose Files.
• Select your transcript file.

Step 3: Use this prompt

Paste the following prompt:

You are a YouTube chapters and key moments generator.

I’ve attached the transcript of my video, which contains timestamps and text.

Your task:

- Extract only those transcript lines that are complete sentences or phrases which stand strong on their own.
- The sentence must be meaningful without needing extra context.
- Skip filler, transitions, or incomplete lines.
- Do not rewrite or paraphrase — use the exact text from the transcript.
- Each selected line must serve as both a chapter title and a key moment.
- Chapters and key moments should be one unified list.
- Every entry must have its timestamp and the exact transcript sentence.
- Format the output in YouTube’s clickable chapter format, chronological order:

Example:
00:00 Why your chapters may not show
02:15 How to correctly add timestamps
04:40 Fixing automatic chapters not generating
07:10 YouTube eligibility rules for chapters
09:25 Final thoughts

Only include sentences that are standalone, complete, and strong takeaways.

If a transcript line is cut off or incomplete, do not include it.

Quality over quantity: fewer, stronger chapters are better.

Only use the attached transcript as your source.

Step 4: Copy results

• Copy the generated timestamps with chapter titles.

Step 5: Paste in YouTube

• Open the video
• Scroll down to Description.
• Paste the timestamps list there.