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Numberphile talks with mathematician Ron Graham about the magnitude of Graham's number, building up from arrow notation to show how impossibly large it is. It is part of a series of videos on this number.

David Heinemeier Hansson's talk at Startup School 2008 on building a profitable startup. He argues for bootstrapping and small, well-run companies instead of chasing investment and exits.

Paul Graham speaks at Startup School 2008 about how to create a successful startup. His talk emphasizes being good, not just avoiding being evil, as a strategic advantage.

Paul Buchheit, creator of Gmail and founder of FriendFeed, speaks at Startup School 08 about listening to users. He covers feedback, features, aiming for 100 happy users, and treating "that's impossible" as a statement of limited experience.

Mike Arrington of TechCrunch speaks at Startup School 2008 about how to get press coverage for a startup and how to respond to it.

Tantacrul's 76-minute deep dive into the history of western music notation and the many proposed replacements, such as piano rolls, colored notes and the jubilate. He explains why none have displaced the current system.

Andrew "bunnie" Huang examines how realistic hardware supply chain attacks are, from rogue insiders to nation states, in the wake of the Bloomberg Businessweek report. He explains how undocumented components could be hidden on boards and how hard they are to spot.

A George Carlin stand-up bit on euphemisms, tracing how language gets softened, such as shell shock becoming PTSD, until it loses its emotional force.

The opening lecture of the How to Start a Startup course at Stanford, with Sam Altman covering ideas and products and Dustin Moskovitz discussing why to start a startup.

A short RepresentUs explainer on how money corrupts American politics and what an anti-corruption act could do about it. It covers lobbying, super PACs and campaign finance, and pitches the group's proposed reforms. The video was later superseded by an updated version.

A 16-minute Y Combinator Startup School talk in which Sam Altman lays out what makes a startup succeed. It covers building a product people tell friends about, exponential markets, real versus fake trends, and having an ambitious vision.

Clayton Christensen explains disruptive innovation using the steel industry, showing how mini-mills beat incumbents from the low end. He argues disruption is not about stupid or bad management.

Rob Pike presents Upspin at Gopherfest 2017, an experimental framework for naming and sharing files and data securely and uniformly across a global namespace. It is a project written in Go rather than about Go.

Perun analyzes how corruption and theft in defence procurement hollowed out the Russian military before its invasion of Ukraine. It explains the mechanics of graft and how it degrades capability.

Joel Spolsky, founder of Fog Creek Software and StackExchange, speaks at Y Combinator's Startup School in 2012. He shares his perspective on building startups.

Sabine Hossenfelder explains superdeterminism as an interpretation of quantum mechanics, addressing common objections and misconceptions, including the worry that it kills free will or science. She ties it to Bell's theorem and hidden variables.

A George Carlin routine on euphemisms and political correctness, tracing how shell shock became PTSD. The uploader adds context about euphemism in political language.

Simone Giertz presents Truckla, a homemade pickup truck conversion of a Tesla Model 3, shown in a short humorous promo.

John Oliver's Last Week Tonight segment takes on Dr. Oz and the dietary supplement industry. It explains what is problematic about both, with a comedic wrap-up.

A Google Tech Talk by Raymond Blum on how Google backs up massive amounts of data such as Gmail and Picasa. It covers scaling challenges, failure types, and approaches that did not work, including tape.

Paul Graham's lecture in the 'How to Start a Startup' course, covering counterintuitive parts of startups and how to have ideas. It is the video form of his essay 'Before the Startup'.

Ben Krasnow of Applied Science shows how to make and test YBCO high-temperature superconductor with a kiln and eBay chemicals. He demonstrates flux pinning and shows a close-up of the crystal structure.

An animated Sprouts video presenting Dietrich Bonhoeffer's argument that stupidity is more dangerous than evil, because reason cannot reach stupid people. It frames stupidity as a social and moral phenomenon.

A short clip of the Mythbusters demonstrating superheated water in a microwave, which can erupt violently when disturbed.

A 74-minute video of upgrading Windows 1.0 through every release up to Windows 8 on a real netbook rather than in a virtual machine.

Perun's hour-long analysis of how institutional lying, cover-ups and corruption ("vranyo") undermined the Russian military in Ukraine. It examines how false reporting up the chain degrades readiness and decision-making.

A CollegeHumor sketch from the Hardly Working series in which a pair of startup founders pitch a website using incomprehensible buzzwords and branding nonsense. It parodies Silicon Valley startup culture.

LGR reviews the Danmere Backer16, a 1996 backup system that stored a PC's data on ordinary VHS tapes through a VCR. He shows the hardware and software on Windows 3.1 and 95.

A short animation that pairs the sound of a dialup modem handshake with a graphic explaining what each phase of the sound means.

Bill Gross, who has founded and incubated many start-ups, ranked hundreds of companies on five factors. He presents the one factor that stood out as the biggest predictor of success.

Clayton Christensen explains his theory of disruptive innovation at Oxford's Said Business School, using examples from steel, Toyota, Sony, Walmart and Godrej. He applies the theory to why some economies stagnate and others grow.

A live, overdub-free performance of 'Lingus' by Snarky Puppy, from the 'We Like It Here' DVD recorded in Utrecht. It features a Cory Henry keyboard solo.

Peter Thiel's lecture from the How to Start a Startup course on business strategy and monopoly theory, arguing that competition destroys profits and that startups should aim to build monopolies. It covers the ideas of Zero to One.

Modern Vintage Gamer examines the claim from the Super Mario 64 decompilation project that the game shipped unoptimized, and puts it in the context of 1996 N64 development.

Chase Adam, founder of the nonprofit Watsi, speaks at Startup School 2013 about building a nonprofit startup.

Tony Seba's 2016 keynote argues that batteries, electric vehicles, self-driving cars and solar will converge to disrupt energy and transportation. He predicts by 2030 all new vehicles will be electric and autonomous and that oil and other fossil fuels will be obsolete.

3Blue1Brown builds intuition for Euler's formula, e^(pi i) = -1, using the core ideas of group theory. It treats exponentiation geometrically as rotation and scaling instead of repeated multiplication.

Pianist Tom Brier sight-reads a piano arrangement of the Super Mario World ending theme, working from a first-draft score by Keeper1st. He takes some liberties with the score as he plays.

A Startup School 2013 session where Paul Graham and Sam Altman hold live office hours with startups including CodeCombat, Flexport and others. The founders pitch and get on-the-spot feedback.

3Blue1Brown introduces group theory and abstract groups, then builds toward classification of finite simple groups and the enormous Monster group with its 196,883 dimensions.