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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.

A one-minute UK road safety advert showing a family car crash in which an unbelted rear passenger kills his mother in a head-on collision. It is a notoriously graphic public information film.

A clip from the film Aliens in which Ripley says to nuke the entire site from orbit because it is the only way to be sure.

Neil and Laura Westwood pitch their Magic Whiteboard, reusable static-cling whiteboard sheets, to the investors on the BBC's Dragons' Den and win 100,000 pounds of investment.

A short clip from The Wire in which police officers manipulate crime statistics to make the numbers look better. It dramatizes how metrics get gamed.

Kirk Sorensen's Google Tech Talk on liquid-fluoride thorium reactors, a design that could burn nuclear waste and use thorium as fuel. It draws on Oak Ridge National Laboratory work from the 1950s and 60s.

A 2008 Google Tech Talk making the case for the liquid fluoride thorium reactor as an abundant, safe source of electrical power. It covers the technical motivations and design of thorium molten-salt reactors.

A 2006 Google Tech Talk by Robert Bussard on inertial electrostatic confinement (polywell) fusion as a cheap, clean alternative to conventional thermonuclear reactors. He argues it could be made viable with modest funding.

Chalmers Johnson, author of Blowback and Sorrows of Empire, lectures on parallels between the decline of the Roman and Soviet empires and the United States. He argues the US shows the same symptoms: overextension, corruption, and an inability to reform.

A four-minute extract from the documentary The Fog of War in which Robert McNamara discusses the Gulf of Tonkin incident. He acknowledges that the second reported attack did not happen.

A short clip of John McCain, asked about Iran, singing 'Bomb bomb bomb, bomb bomb Iran' to the tune of the Beach Boys' Barbara Ann.

A one-minute clip of John McCain singing 'Bomb bomb Iran' to the tune of a Beach Boys song at a 2007 campaign event.

The famous Alec Baldwin monologue from the film Glengarry Glen Ross, where his character Blake berates salesmen with the 'Always Be Closing' speech. It is a short, profane scene about sales pressure and motivation.

A short Adam Curtis clip on what he calls oh dearism, the habit of news reporting that presents events as a stream of sad, inexplicable happenings. He argues this leaves viewers passive and unable to imagine action.

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

The first part of a four-part Channel 4 (UK) documentary series presented by Howard Goodall, this episode covers melody and why tunes affect us so deeply. It explains how melody works in Western music with historical background and music theory.