Why The YouTube Algorithm Will Always Be A Mystery
Why The YouTube Algorithm Will Always Be A Mystery
Why The YouTube Algorithm Will Always Be A Mystery

Why The YouTube Algorithm Will Always Be A Mystery - Tom Scott

Tom Scott
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Hi, I'm Tom Scott. These are some of the things I've made and done. They'll probably come back to haunt me in a few years' time. (Want to get in touch about anything? Use the "contact me" link below, not YouTube messages!)

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The Link That Can Crash Chrome: http://a/%%30%30

http://tomscott.com - http://twitter.com/tomscott - In the news today: a link which, when moused over or clicked on, crashes Google Chrome. It's a heck of a bug: but how does it work, and what does it have to do with "null-terminated strings"? TECH DETAILS: https://code.google.com/p/chromium/issues/detail?id=533361

Why Snow and Confetti Ruin YouTube Video Quality

Your sports team wins. The confetti drops. And suddenly, the video quality falls apart. Why? Let's talk about interframe compression, bitrate, and unnecessary green screen effects. I'm at https://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Instagram as @tomscottgo You might also like: How Green Screen Worked Before Computers: https://www.youtube.com/watch?v=msPCQgRPPjI This uses one Creative Commons by-attribution photo, "Sony Trinitron" by Antífama, available here: http://flic.kr/p/6DBMYn

How The Self-Retweeting Tweet Worked: Cross-Site Scripting (XSS) and Twitter

http://tomscott.com - http://twitter.com/tomscott - It should never have happened. Defending against cross-site scripting (XSS) attacks is Web Security 101. And yet, today, there was a self-retweeting tweet that hit a heck of a lot of people - anyone using Tweetdeck, Twitter's "professional" client. How did it work? Time to break down the code. (Remember the old Myspace worms? They worked the same way.) THE SELF-RETWEETING TWEET: https://twitter.com/derGeruhn/status/476764918763749376

How YouTube Video Stabilization Works

http://tomscott.com - @tomscott - From tracking a point, to analysing pixels, to plotting 3D camera moves: here's how you go from shaky handheld shots to that "gliding through the Matrix" effect. Thanks to Matt Gray for his excellent camera work - he's at http://mattg.co.uk - @unnamedculprit

Why Electronic Voting is a BAD Idea - Computerphile

Voting is centuries old, why can't we move with the times and use our phones, tablets and computers? Tom Scott lays out why e-voting is such a bad idea. More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels

2030: Privacy's Dead. What happens next?

http://tomscott.com - http://twitter.com/tomscott - At dConstruct 2014, I spin a tale of the future: not to make a prediction, but to put our current world in perspective. Thanks to all the dConstruct folks at the Brighton Dome: crew, volunteers, and audience!

How To Debunk Perpetual Motion Machines - with Tom Scott

Warning: Contains flashing images. You know those videos showing working perpetual motion machines? They’re fake. Tom Scott helps us explain how to debunk them. Watch his video here: https://youtu.be/EiZU3BvqvP4 Perpetual motion machines are tantalising. Videos of contraptions claiming to have achieved the impossible goal of endless free motion rack up millions of views on YouTube. But they’re not real. Perpetual motion machines violate the fundamental laws of our universe. In this video, we teamed up with YouTuber Tom Scott to provide three simple ways to debunk persistent claims of perpetual motion: a guide to protect you from the bunk. People have been...

Why The Government Shouldn't Break WhatsApp

Encryption backdoors - breaking WhatsApp and iMessage's security to let the government stop Bad Things - sounds like a reasonable idea. Here's why it isn't. A transcript of this video's available here: https://www.facebook.com/notes/tom-scott/why-the-government-shouldnt-break-whatsapp/1378434365572557/ CREDITS: Filmed at the Cambridge Centre for Computing History: http://www.computinghistory.org.uk/ Camera by Tomek: https://www.youtube.com/tomek Thanks to everyone who helped proofread my script! REFERENCES: WhatsApp's privacy protections questioned after terror attack: http://www.bbc.co.uk/news/technology-39405178 WhatsApp must be accessible to authorities, says Amber Rudd: https://www.theguardian.com/technology/2017/mar/26/intelligence-services-access-whatsapp-amber-rudd-westminster-attack-encrypted-messaging UK government renews calls for WhatsApp backdoor after London attack: https://www.theverge.com/2017/3/27/15070744/encryption-whatsapp-backdoor-uk-london-attacks Investigatory Powers Act: http://www.legislation.gov.uk/ukpga/2016/25/contents/enacted India is 'ready to use' Blackberry message intercept system: http://www.bbc.co.uk/news/technology-23265091 Revealed: how US and UK spy agencies defeat internet privacy and security: https://www.theguardian.com/world/2013/sep/05/nsa-gchq-encryption-codes-security Councils...

Will YouTube Ever Run Out Of Video IDs?

In the URL of each YouTube video is the 11-character video ID, unique for each video. Can they ever run out? Just how many videos can YouTube handle? To work it out, we need to talk about counting systems, and about something called Base 64. Want to know how the single camera shot was done? "Matt Bought a DJI Osmo and It's Surprisingly Good" is today's video over on the Park Bench: https://www.youtube.com/watch?v=Dyy41yAs8nc I'm at https://tomscott.com/ or on Twitter at http://twitter.com/tomscott or on Facebook at http://facebook.com/tomscott or on Instagram as tomscottgo. Filmed by Matt Gray, who's at http://mattg.co.uk or @unnamedculprit on basically everything everywhere.

Tom Scott vs Irving Finkel: The Royal Game of Ur | PLAYTHROUGH | International Tabletop Day 2017

YouTuber Tom Scott has flown drones through lightning, he’s taken on the first human-powered theme park, he’s even visited Penistone. But he’s never taken on a British Museum curator in the world’s oldest playable board game… UNTIL NOW! For International Tabletop Day 2017, Tom Scott was challenged by British Museum Curator Irving Finkel to a round of the oldest playable board game in the world – The Royal Game of Ur – a game whose rules were rediscovered and deciphered by Irving himself. Interested in other mysterious cuneiform tablets deciphered by Irving? Check out his book 'The Ark before Noah' to find...

World's Roundest Object!

The world's roundest object helps solve the longest running problem in measurement -- how to define the kilogram. Support Veritasium on Patreon: http://bit.ly/VePatreon A kilogram isn't what it used to be. Literally. The original name for it was the 'grave', proposed in 1793 but it fell victim to the French Revolution like its creator, Lavoisier. So begins the tale of the most unusual SI unit. The kilogram is the only base unit with a prefix in its name, and the only one still defined by a physical artifact, the international prototype kilogram or IPK. But the problem with this definition has long been...

Why Tom Couldn't Show You The World's Largest Artificial Sun

Tom saw something very impressive in person. Here's why it didn't look anywhere near as impressive on camera. Also hand rubbing. MATT: http://youtube.com/unnamedculprit | TOM: http://youtube.com/TomScottGo Synlight – The World's Largest Artificial Sun - http://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10080/150_read-21807/ Wendelstein 7X (An experimental stellarator nuclear fusion reactor) - https://www.ipp.mpg.de/w7x Neckarwestheim and the End Of The World: Citation Needed 1x06 - https://www.youtube.com/watch?v=g1KTl176Mww

How Machines Learn

How do all the algorithms around us learn to do their jobs? Bot Wallpapers on Patreon: https://www.patreon.com/posts/15959388 Discuss this video: https://www.reddit.com/r/CGPGrey/comments/7klmd3/how_do_machines_learn/ Footnote: https://www.youtube.com/watch?v=wvWpdrfoEv0 Podcasts: https://www.youtube.com/user/HelloInternetPodcast https://www.youtube.com/channel/UCqoy014xOu7ICwgLWHd9BzQ Thank you to my supporters on Patreon: James Bissonette, James Gill, Cas Eliëns, Jeremy Banks, Thomas J Miller Jr MD, Jaclyn Cauley, David F Watson, Jay Edwards, Tianyu Ge, Michael Cao, Caron Hideg, Andrea Di Biagio, Andrey Chursin, Christopher Anthony, Richard Comish, Stephen W. Carson, JoJo Chehebar, Mark Govea, John Buchan, Donal Botkin, Bob Kunz https://www.patreon.com/cgpgrey How neural networks really work with the real linear algebra: https://www.youtube.com/watch?v=aircAruvnKk Music by: http://www.davidreesmusic.com

Single Point of Failure: The (Fictional) Day Google Forgot To Check Passwords

http://tomscott.com - @tomscott - I spin a (fictional) tale of the day that Google accidentally opened everything. Performed at GeekyConf, with thanks to Betsy Weber and Natalie Downe on camera.

AI YouTube Comments - Computerphile

Generating YouTube comments with a neural network trained on YouTube comments. What could possibly go wrong? Dr Mike Pound replied to our comment... EXTRA BITS: https://youtu.be/PpYJcrNCP3U Neural Networks & Deep Learning: https://www.youtube.com/playlist?list=PLzH6n4zXuckoezZuZPnXXbvN-9jMFV0qh Andrej Karpathy Blog post mentioned by Mike: http://bit.ly/C_Blog_RNN Code that Mike used to create this: http://bit.ly/C_RNN_Code http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com

Wheels, Bombs, and Perpetual Motion Machines

This is a collaboration with the Royal Institution! Go check out their video here: https://youtu.be/sScrtGdKmho -- Perpetual motion machines are badly named. And impossible. But that hasn't stopped a lot of people trying to build them. Sure, you could try and argue physics: but there's a more common-sense reason why free energy's not coming any time soon. I'm at http://www.tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Instagram and Snapchat as tomscottgo

An Elevator That Actually Goes Sideways

I've filmed a paternoster lift; I've filmed the strange Genoa elevator that sort-of goes sideways. So when I got an email from Thyssenkrupp, an elevator company, saying "come and see our Multi elevator that actually goes sideways", I wasn't going to turn it down. Full disclosure: Thyssenkrupp paid for my travel to Germany, but that's all they did. I'd got in touch with them last year asking to see this when it opened; their PR firm replied, offering to fly me out. They had no editorial control over this, and didn't get to see it before it was uploaded! More information about...

⚫ How The Black Point Message Crashes Android Apps

"_If you touch the👇black point then your whatsapp will hang_", says the message that's being sent around, and it's right. It's a text rendering bug, the same as many others -- which isn't interesting. But the characters it's using, Unicode RTL and LTR marks, are worth knowing about. Thanks to everyone who suggested this subject! The Unicode Bidirectional Algorithm: http://unicode.org/reports/tr9/ I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo

The Little-Known Patterns on British Streets

I thought about saying "secret patterns" or "mysterious patterns" in the title, but that'd be a lie: they're just mostly unknown! So let's talk about tactile paving, about design, about accessibility, and about those bumpy bits that you stand on when you're crossing a British street. // Thanks to Richard Holmes and the team from the RNIB! They're at http://rnib.org.uk, on YouTube at http://youtube.com/rnibuk and on Twitter at http://twitter.com/rnib ! The design manual is called Guidance on the Use of Tactile Paving Surfaces (Department of the Environment, Transport and the Regions, 1998) [PDF]: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/289245/tactile-paving-surfaces.pdf Editor: Michelle Martin (@mrsmmartin) DoP / camera operator: Tomek...

We Sent Garlic Bread to the Edge of Space, Then Ate It

The title says it all, really. Thanks to Barry from My Virgin Kitchen - go see him cook and test three different garlic breads here: https://youtu.be/jYPYbIO9BLE - and to Steve from Random Aerospace, http://www.randomengineering.co.uk/Random_Aerospace/Welcome.html ! Pull down the description for more details. This started as a conversation in a pub a few weeks ago, and turned into one of the more ridiculous videos I've ever done. We send home-made garlic bread skyward on a balloon; exposed it to the stratosphere, 35km up; successfully returned it to earth in a protective box; and then ate it. It tasted... cold. Audio mix by Matt...

Rotary Jails and Accidental Amputations

In Crawfordsville, Indiana, there's a rotary jail: an invention that, with hindsight, should probably never have been built. But it was, here and in other towns across the United States. It might have sounded like a good idea on paper, but in practice, it had a few unfortunate problems... including occasional accidental amputations. More about the Rotary Jail Museum: http://www.rotaryjailmuseum.org/ Edited by Michelle Martin, @mrsmmartin I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo

Let's Play: Bar Billiards

Bar billiards is a little-known British pub game. And in the tradition of video game "let's plays" -- only in the real world -- I got some folks together for a match. THE RULES: Pot the balls in the holes. Each hole's worth some points. Red ball's worth double. Don't knock over the pegs. And you only score those points when you play a legal shot that doesn't pot anything. Don't worry, you'll work it out soon enough. FEATURING: MATT: http://standupmaths.com - @standupmaths IZZY: @izkirk JIM: http://singingbanana.com - @jamesgrime TOM: http://tomscott.com - @tomscott WITH: MATT GRAY on camera: http://mattg.co.uk - @unnamedculprit MICHELLE MARTIN editing: http://www.youtube.com/channel/UCCQrkogtWChHBMmRXUkT0Tw - @mrsmmartin THANKS TO: THE PEMBURY...

The US-Canada Border Splits This Road Down The Middle

Rue Canusa (or Canusa Avenue) is a street that's split in two by a border: the northern part is in Stanstead, Canada, and the southern part is in Derby Line, USAand border crossings here aren't as easy as they used to be. Edited by Michelle Martin (@mrsmmartin) I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo

Making Artificial Earthquakes with a Four-Tonne Steel Ball

In Göttingen, Germany, there's a four-tonne steel ball that can be raised up a 14-metre tower -- and then dropped in less than two seconds, crashing back to earth. It makes tiny, artificial earthquakes: here's why. Thanks to all the team at Wiechert'sche Erdbebenwarte Göttingen! You can find out more about them here: https://www.erdbebenwarte.de/ Three things I had to cut out of this video, because they didn't quite fit into the story or because I couldn't film them: The reason the steel ball survived two world wars is because the university's records listed it by use as a "rock-ball", not by composition as...

G-Force, Jerk, and Passing Out In A Centrifuge

Thanks to the Starrship team for arranging this! I'm also over on their channel, flying with the Blades: https://www.youtube.com/watch?v=iWY3-1gOrxk • At the Royal Air Force training centrifuge in Farnbrough, pilots learn how to avoid G-LOC: g-induced loss of consciousness. Let's talk about g-force, about jerk, and about how to keep circulation flowing to your brain. FAQs: * Isn't 3.6g a really low g-tolerance? * Yep. Turns out I would not qualify to be a fighter pilot. The average range for g-tolerance is 4-6; no-one was expecting me to pass out. The centrifuge team do not deliberately try to G-LOC people! To be fair,...