How to summarise a YouTube video with ChatGPT in 4 steps

Getting the transcript

1. Open the video description

   Click the description area below the video to expand it.

2. Find Show transcript

   Usually near the bottom of the expanded description. Most videos with captions have one.

3. Copy it

   The panel opens beside the video. Select the text and copy. There is a toggle to hide timestamps if you prefer, though keeping them is usually more useful.

4. Paste it into ChatGPT with your question

   No upload needed, which also means it does not touch your upload allowance at all.

Asking for something better than a summary

A summary of a video is usually as unsatisfying as a summary of a meeting. More useful requests:

For a tutorial:

From this transcript, give me the steps in order, as a numbered list, with the timestamp each one starts at. Leave out the introduction and the sponsorship section.

For a talk or interview:

What is the main claim, what evidence is given for it, and what is asserted without support? Quote the line each point came from.

For deciding whether to watch it at all:

In five bullets, what does this video actually cover? Then tell me whether it addresses [your specific question], and at what timestamp.

That last one is the highest value use of this by a distance. Three minutes to find out a forty minute video does not answer your question is a good trade.

What a transcript misses

Speech only. Anything demonstrated on screen and not narrated is absent.

That matters most for tutorials, where "and then you click here" is the whole instruction and the transcript records it as exactly that. For a talking-head video, an interview or a lecture, a transcript loses very little.

If the visuals carry the content, screenshot the important moments and upload them as images alongside the transcript. Images are capped at 20 MB each with a ceiling of about 100 per conversation.

Long videos

Auto-generated transcripts are wordy, since speech is repetitive. A ninety minute video can produce a transcript long enough to matter.

If it approaches 2 million tokens, it gets truncated silently. Check by asking what the final thing discussed was. If it cannot say, it did not reach the end, which for a video with a conclusion is the part you wanted.

Several videos at once

The same two-pass approach that works everywhere else. Summarise each transcript separately into the same structure, then compare:

Here are structured notes from six videos on the same topic. Where do they agree, where do they conflict, and which one actually explains the mechanism rather than describing the outcome?

Genuinely useful for working through a playlist, and it keeps attribution intact, which uploading six transcripts at once does not.