Transcribe Numberphile Videos from YouTube
Read every Numberphile proof and explanation in plain text
Or just change youtube.com to 2outube.com in your browser
To transcribe any Numberphile video, open it on YouTube and change youtube.com to 2outube.com in the URL bar. The full transcript loads instantly — no form, no account. Perfect for following dense mathematical reasoning step-by-step, copying equations, or studying proofs at your own pace without pausing and rewinding.
The Trick
youtube.com/watch?v=VIDEO_ID
2outube.com/watch?v=VIDEO_ID
Just change 'y' to '2'
Works with any YouTube video that has captions
Why Transcribe Numberphile Videos from YouTube
Numberphile videos move quickly through multi-step proofs that are easy to lose track of.
When mathematicians on Numberphile describe formulas verbally, the transcript captures that language precisely.
Numberphile has over 700 videos covering topics from prime numbers to topology.
Numberphile's presenters use precise mathematical vocabulary that can be hard to catch by ear in a second language.
How to Transcribe
Find the Numberphile video you want on YouTube
Go to the Numberphile channel on YouTube (youtube.
Change youtube to 2outube
In the URL bar, replace 'youtube.com' with '2outube.com' and press Enter. The full transcript loads instantly alongside the video.
Read, search, and copy the mathematical content
Use the transcript to follow every spoken proof and explanation in text form.
Tips for Transcribing Numberphile Videos from YouTube
Use Ctrl+F to find the exact moment a concept is introduced
Numberphile videos often define a term or state a theorem once before building on it.
Cross-reference the transcript with the on-screen writing
Presenters like Matt Parker and James Grime write equations on brown paper while speaking.
Bookmark videos with dense transcripts for later deep study
Longer Numberphile episodes on topics like the abc conjecture or p-adic numbers have transcripts that reward slow reading.
Copy segment text to paste into AI tools for further explanation
If a section of the transcript still feels unclear, copy that passage and ask an AI assistant to break it down further.
Sample Workflow
Open the Numberphile video
Open the Numberphile video on the Banach-Tarski paradox on YouTube and swap 'youtube.com' to '2outube.
Use Ctrl+F to search
Use Ctrl+F to search for 'decompose' and read every sentence around that term, building a clear outline of the proof's.
Copy the precise wording
Copy the precise wording of the key definitions and paste them into your assignment with timestamps, then cite the Numberphile.
Questions
Does this work with any YouTube video?
Yes, it works with any video that has captions. Most YouTube videos have auto-generated captions.
Is it really free?
Completely free. No account, no subscription, no limits.
Do all Numberphile videos have captions available?
The vast majority do — Numberphile has been publishing since 2011 and YouTube has auto-generated captions for nearly the entire back catalogue.
Will the transcript capture mathematical terms correctly?
Auto-generated captions transcribe spoken words, so verbal descriptions like 'the square root of two' or 'Euler's number' are captured accurately.
Can I transcribe Numberphile Extra or standalone Brady Haran videos?
Yes. Any public YouTube video URL works the same way — just swap youtube.com to 2outube.com regardless of which channel it's on. Numberphile Extra, Sixty Symbols, and all other Brady Haran channels are supported.
Can I download or save the transcript as a text file?
You can select all the transcript text on the 2outube page and copy it into any text editor or notes app. From there you can save it as a plain .
Does 2outube work on mobile when watching Numberphile?
Yes. Edit the URL directly in your mobile browser's address bar — tap the URL, change youtube.com to 2outube.com, and load the page. The transcript displays in a mobile-friendly layout alongside the video.
Is there a faster way to open 2outube for a Numberphile video I'm already watching?
The quickest method is to tap or click the address bar, use find-and-replace if your browser supports it, or simply position the cursor after the 'y' and type '2outube.com' over 'youtube.com'.
Get the transcript of any Numberphile video right now
Free, no signup required
Try It Free