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The first video in potholer54's climate series, giving a basic look at how climate scientists infer that man-made carbon gases are changing the climate. It is a short explainer meant to present the scientific evidence plainly.

Philosopher Dan Dennett argues in a TED talk that we do not understand our own consciousness and that our brains often fool us. He uses perceptual examples, including a painting that invites the viewer to fill in detail.

A restored recording of Steve Jobs unveiling the original Macintosh in 1984, including the moment it is taken out of its bag and speaks. The upload comes from the team that rediscovered and restored the lost footage.

Jay Smooth's short video on how to tell someone their words sound racist. He argues for focusing on what the person said or did rather than labeling who they are.

Bobby McFerrin uses audience participation at a World Science Festival event to demonstrate how instinctively people follow the pentatonic scale.

A Symphony of Science music video that auto-tunes samples of Carl Sagan, Richard Feynman, Neil deGrasse Tyson and Bill Nye into a song about the wonder of the universe.

A two-minute 1981 interview clip in which Richard Feynman answers an artist friend who claims science takes the beauty out of a flower. Feynman argues that understanding adds to beauty and mystery.

Economist-comedian Yoram Bauman delivers a humorous translation of Mankiw's ten principles of economics for the uninitiated. It was presented at the AAAS humor session in 2007.

A three-minute excerpt from Milton Friedman's Free to Choose in which he uses a pencil to show that no single person knows how to make it. He argues that the free market coordinates countless strangers peacefully.

A promotional commercial for Microsoft Songsmith, software that generates backing music from a vocal recording. The ad became widely known for its awkwardness.

A compilation of the first four iPhone commercials from the June 2007 launch. The ads walk through using the device and stress real web browsing.

The famous 1984 Apple Macintosh television commercial, framed as a rebellion against an Orwellian Big Brother. This copy was uploaded to YouTube just after the site launched.

A one-minute 1949 television commercial for Camel cigarettes claiming that more doctors smoke Camels than any other cigarette.

A very short clip from Yes, Prime Minister in which Sir Arnold and Sir Humphrey run through a piece of circular political reasoning. It is the origin of the so-called politician's logic.

An excerpt from Hal Abelson's opening SICP lecture introducing computer science and contrasting declarative and imperative knowledge. He argues that computer science is not really a science and is more like magic or engineering of ideas.

A 2007 Google Tech Talk introducing Polyworld, an artificial life simulator used to evolve artificial intelligence by designing worlds rather than minds. It presents results from ongoing attempts to evolve intelligent behavior.

A short video of stretching and hand exercises for preventing and easing tendinitis and carpal tunnel syndrome, from a percussion teacher. The exercises were shown to him by a doctor.

The official video for Baba Yetu, Christopher Tin's Swahili-language choral piece written as the theme to Civilization IV. It was the first video game music to win a Grammy.

Clifford Stoll's energetic TED talk, a wandering mix of anecdotes, a science experiment and thoughts on curiosity, education and technology. He is the author of The Cuckoo's Egg.

James Howard Kunstler's TED talk argues that American public spaces and architecture have become unworthy of care, damaging civic life. He presents suburban sprawl and car-first design as failures of the common good.

Gary Vaynerchuk's Web 2.0 Expo keynote on building a personal brand in social media. He urges keeping a day job while building something on the side, with passion and persistence, in a loud and profane style.

In a TED talk, behavioral economist Dan Ariely uses visual illusions and his research to show that people are less rational in their decisions than they think. He covers defaults, such as organ donation rates, and how choice framing steers decisions.

Cindy Gallop gives a 4-minute TED2009 talk arguing hardcore pornography has distorted how young men think about sex. She introduces her website MakeLoveNotPorn as a response.

John Allspaw and Paul Hammond's Velocity 09 talk on how Flickr achieved ten or more deploys per day through close cooperation between development and operations.

Mark Bittman and baker Jim Lahey of Sullivan Street Bakery demonstrate the no-knead bread recipe, where a long, slow rise does the work instead of kneading. It is a short New York Times recipe video.

A three-minute clip of Richard Feynman using the rules of chess as an analogy for how science works, discovering rules by observation and sometimes meeting surprises like castling. It touches on incremental progress versus revolutions.

A Spike Jonze-directed Ikea commercial in which a discarded lamp is treated sympathetically, until a twist undercuts the sentiment. It is a short, well-known piece of advertising.

A 2000 IBM commercial in which Avery Brooks complains that we still have no flying cars. It plays on the failed futurist promises of the twentieth century.

A 2006 television appearance in which Peter Schiff warns on Kudlow & Co about the housing bubble and an approaching US economic collapse.

A 45-minute Flex Your Rights documentary on how to deal with police in three situations: traffic stops, encounters at home, and on the street. It presents practical advice on asserting constitutional rights and refusing searches.

A clip from the film The Lives of Others showing Wiesler as a ruthless, efficient Stasi interrogator who uses a recorded interrogation to train new officers. HN uses other scenes from the same film as well.

The 1951 US civil defense film 'Duck and Cover', starring Bert the Turtle, which taught schoolchildren to drop and shield themselves during a nuclear attack. It was shown to millions of children and is preserved in the National Film Registry.

A live 2007 performance of Todd Snider's song 'Statistician's Blues' at the Great American Music Hall. The song satirizes statistics and how readily people believe them.

An edited excerpt of Steve Jobs introducing Mac OS X at Macworld San Francisco in 2000. It covers the Aqua interface, Quartz graphics built on PDF, and the Classic, Carbon and Cocoa application environments.

A Dutch parody commercial from the Groen Brothers for a supposed Star Wars style mosquito defense system. It mimics the style of infomercials with laser-armed anti-mosquito technology.

A short clip of CNBC's Jim Cramer insisting Bear Stearns is fine in March 2008, days before the firm was sold to JP Morgan for $2 a share.

A one-minute animated commercial for the antidepressant Zoloft, described as the original that inspired later sequels and parodies.

First lecture of MIT 6.00, an introductory computer science course taught in Python by Eric Grimson and John Guttag. It covers the goals of the course, what computation is, and data types, operators and variables.

A one-minute clip of Alexander Overwijk drawing a near-perfect freehand circle, one metre across, in under a second on a chalkboard. He is a repeat winner of the World Freehand Circle Drawing Championship.

A short clip parodying Windows Vista's cancel-or-allow security prompts, in the style of Apple's Mac vs PC ads.