youtube algorithm

Cuong Do of YouTube describes how a handful of engineers scaled the site, covering hardware, software and database scalability challenges during its rapid growth. The talk was given at the 2007 Seattle Conference on Scalability.

The first video ever uploaded to YouTube, in April 2005. Co-founder Jawed Karim stands in front of the elephants at the San Diego Zoo for about 19 seconds.

A short 2009 amateur video showing an HP MediaSmart webcam whose face tracking follows a white face but fails to track a black face. The uploader presents it as humorous.

Karl Sims's 1994 demonstration of evolved virtual creatures: block-bodied creatures whose bodies and controllers are evolved through selection, mutation and recombination to swim, walk and compete.

Seventeen-year-old Ray Kurzweil appears on the TV show I've Got a Secret in 1965, playing a piece of music composed by a computer program he built.

Jon Bentley walks through three implementations of Hoare's Quicksort, from a dozen-line C function to a series of systematic code transformations that make the program ever simpler and more powerful. It is a Google Tech Talk on code elegance and program derivation.

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 one-minute clip from Barack Obama's 2008 Google visit in which Eric Schmidt asks him the most efficient way to sort a million 32-bit integers. Obama answers that bubble sort would be the wrong choice.

Robert Lustig of UCSF lectures on the biochemistry of sugar, arguing that fructose and lack of fiber drive the obesity epidemic via insulin. It is the widely viewed 90-minute talk that popularized the anti-sugar case.

Neil Fraser of Google presents Differential Synchronization, the algorithm behind MobWrite, for keeping multiple copies of a document in sync in real time. The talk argues the approach is robust, convergent and efficient.

A one-minute clip of Slavoj Zizek showing what he calls the official geographical limit between the Balkans and Central Europe, standing at a river in Ljubljana. It is a short, absurd and funny piece of cultural geography.

A Little Britain sketch featuring the 'Computer says no' catchphrase, in which a clerk refuses requests by deferring to her computer.

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 1999 Qwest commercial in which a weary traveler at a remote motel is told every room offers every movie ever made, on demand. It was shot at Roy's Motel in Amboy, California.

The official music video for Rick Astley's 1987 hit Never Gonna Give You Up, the song behind the Rickroll internet prank.