Uploaded February 2022 | Updated September 2026, 2 weeks ago

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Happy Twos-Day Tuesday! Please donate to WaterAid using the fundraising link on this video or direct at wateraid.org It's ridiculous that in 2022 not every human can go for a safe and sanitary number two.

Continue this video on Steve Mould Shorts: youtube.com/shorts/267MQF1z2PU
And then on Numberphile 2: youtu.be/2XKuG7cA03A

This video featured these humans. If you enjoyed their clip here: please do visit their channel and subscribe to them. Let's keep the edu-tuber community growing!

James Grime - youtube.com/singingbanana
Katie Steckles - youtube.com/KatieSteckles
Steve Mould - youtube.com/SteveMould
Ben Sparks - youtube.com/SparksMaths
Ayliean MacDonald - youtube.com/Ayliean
Grant '3Blue1Brown' - youtube.com/3blue1brown
Brady 'Numberphile' - youtube.com/numberphile
Hannah Fry - youtube.com/watch?v=Rzhpf1Ai7Z4
Simone Giertz - youtube.com/simonegiertz
Mehdi 'ElectroBOOM' - youtube.com/Electroboom
Mithuna 'Looking Glass Universe' - youtube.com/LookingGlassUniverse
Geoff Marshall - youtube.com/geofftech2
Jade 'Up and Atom' - youtube.com/UpandAtom
Jeremy Fielding - youtube.com/JeremyFieldingSr
Eddie Woo - youtube.com/misterwootube
Vi Hart - youtube.com/Vihart
Rohin 'Medlife Crisis' - youtube.com/MedlifeCrisis
'Tom Rocks Maths' - youtube.com/TomRocksMaths
Destin Sandlin - youtube.com/smartereveryday
Tom Scott - youtube.com/TomScottGo
and VFX by Eugénie Von Tunzelmann - imdb.com/name/nm1590981

Cheers to my Patreon supporters and everyone who supports all of the above content creators. We wouldn't have a such a variety of people doing this for a living if it was not for the dedicated audience who chip in. You can also help support and shape the videos I make: patreon.com/standupmaths

CORRECTIONS
- Ok, I'll try to keep track of corrections but this one could be a wild ride. Let me know if you spot any significant mistakes!
- PS And I'll admit one correction right now: the titles claims 22 YouTubers but Ayliean is mainly a TikToker; Hannah Fry doesn't have her own channel and nor does Eugénie. But they all do loads of work on, in and with YouTube videos!

Filming of each clip was done by whoever is in the shot.
Editing by Alex Genn-Bash. It has aged him 22 years.
Stupid idea by Matt Parker with help from Steve Mould and Grant Sanderson.
Music by Howard Carter
Design by Simon Wright and Adam Robinson

English subtitles thanks to the world's greatest team of volunteers.

MATT PARKER: Stand-up Mathematician
Website: standupmaths.com
US book: penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker
UK book: mathsgear.co.uk/collections/books/products/humble-pi-signed-paperback