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Applied Science shows how telecentric and hypercentric optics differ from normal lenses, producing no or negative perspective. The video builds a telecentric system from a Fresnel lens and demonstrates a lens that can see around objects.

Footage of the Mercedes A-Class production line at the Rastatt plant in Germany, filmed in 2013. It shows robots and fixtures working through assembly.

A short Vox video on Barcelona's superblocks, an urban design approach that closes interior streets to through traffic to return space to pedestrians.

A short clip of Robert Sapolsky on how social hierarchy generates chronic stress, drawing on baboon research. It links rank-related stress to heart health and life expectancy.

Footage of IIHS tests of pedestrian automatic emergency braking on 16 midsize cars, with ratings from superior to basic or no credit.

Asianometry explains the EUV light source inside ASML's lithography machines, where lasers hit falling tin droplets twice to produce 13.5 nm light. It walks through the engineering of the droplet generator, the pre-pulse and main laser, and the plasma that results.

Kaze Emanuar explains how he rewrote and optimized the Super Mario 64 source code so it runs far faster on real N64 hardware. He covers performance bottlenecks and fixes in detail for his ROM hacks.

A 2020 video by laowhy86 arguing that the coronavirus did not originate outside China, pointing to evidence about the Wuhan institute and a possible patient zero. It cites sources in the description.

A reverse engineer walks through fixing a ten-year-old bug in Guitar Hero III without access to its source code, using a disassembler and decompiler. It is technical but explained step by step.

An RSA Animate adaptation of a Slavoj Zizek talk on charitable giving and ethical consumerism. It argues that buying products that bundle a charity donation can sustain the system that causes the problems.

Naomi Wu visits the Shenzhen offices of smartphone maker UMIDIGI in person to get them to release source code they owed under the GPLv2, and they comply.

Donnie Berkholz of RedMonk gives a Monki Gras talk arguing that abusive, toxic contributors damage open source projects. He makes the case for removing them from communities.

Tantacrul tells the story of Audacity, the widely used free audio editor, and announces his involvement in the project. It includes an interview with the original developers and a look at the software's usability.

Neuroscientist Beau Lotto runs the audience through color and pattern illusions to show that perception is shaped by context and evolutionary history rather than being a direct readout of the world. The talk is playful and hands-on, and it argues that the brain interprets ambiguous signals.

Marcin Jakubowski of Open Source Ecology presents his plan to open-source blueprints for 50 cheap, buildable farming tools, a "civilization starter kit". He argues that opening the means of production can enable self-sustaining lives.

A short smartphone-recorded clip from a 2014 event in Paris where DeepMind CEO Demis Hassabis presents an AI learning to play old Atari games. The system learns from only the video signal and the score. Audio quality is poor.

Veritasium explores why time seems to speed up as we age, covering chronoception and several competing explanations beyond the common proportional-theory argument.

Tantacrul explains how he and engraver Simon Smith designed the free music notation font for MuseScore 3.6. It draws on the history of the SCORE notation application by Leland Smith.

Mario Zechner explains why he built pi, a minimal coding agent, out of frustration with existing agent harnesses. He also discusses how AI agents are straining open source projects and argues for slowing down.

A short TFiR clip of Linus Torvalds explaining why he thinks GPLv3 violates what GPLv2 stood for. He describes why he chose GPLv2 for kernel development and his view of the FSF's approach.

Part 2 of the IROS 2011 keynote by Sebastian Thrun and Chris Urmson on Google's self-driving car. It shows how the car perceives its surroundings with a lidar point cloud and recognizes traffic lights and pedestrians. The audio is poor because it was recorded on a pocket camcorder.

Two Minute Papers covers OpenAI's multi-agent hide-and-seek experiment, in which agents learned emergent tool use and found ways to break the game's rules. It summarizes the 'Emergent Tool Use from Multi-Agent Interaction' paper.

Vsauce explores qualia and whether different people experience colors the same way. It draws on color blindness, Mary's room, the explanatory gap and subjective experience.

Neuroscientist Anil Seth argues in this TED talk that perception is a controlled hallucination: the brain constantly predicts the world and our shared agreement is what we call reality. He also touches on the construction of the self.

Karen Sandler, then Executive Director of the GNOME Foundation, talks at OSCON 2011 about the risks of proprietary, closed-source software in implanted medical devices like her own pacemaker-defibrillator.

SciPy 2015 talk by Nathaniel Smith and Stefan van der Walt on choosing a new default colormap for Matplotlib. It covers why Jet misleads, how perceptual color spaces work, and how viridis was designed.

Louis Rossmann explains why he stopped using GrapheneOS, describing his interactions with its lead developer Daniel Micay. It includes chat logs shown in the video.

A short TFiR clip in which Linus Torvalds explains his view that respect should be earned rather than given, in defense of his blunt and insulting style.

Robert Miles explains reward modelling, in which an AI learns what humans want from their preference comparisons instead of a hand-written reward function. He walks through the 2017 paper on deep reinforcement learning from human preferences.

Matt Parker of Stand-up Maths demonstrates MENACE, Donald Michie's 1961 machine made of matchboxes that learns to play noughts and crosses through reinforcement. He builds and trains a physical version.

Chris Urmson, head of Google's self-driving car program, shows footage of how the car perceives the road and decides what to do. Examples include cyclist hand signals, school buses, police officers and complex intersections.

A short hyperlapse of a 2019 Toyota Corolla using comma.ai's OpenPilot 0.6.3 to drive 100 miles with no intervention except for the windshield wipers.

Robert Miles covers a paper where researchers ran real versions of his earlier mesa-optimizer thought experiments. They show inner misalignment, where an AI learns the wrong goal in training and misbehaves when deployed.

A short !!Con 2016 talk by blind developer Sina Bahram on how he uses a computer and writes code with a screen reader at about 1,000 words per minute. He plays how common interfaces sound and challenges the audience to go a day using only the keyboard.

CuriousMarc connects a restored 1930 Model 15 Teletype to a Linux machine and uses it as a terminal, after commenters requested it. The video shows the challenges of linking a 5-bit mechanical device to a modern OS.

Bisqwit writes a NES emulator in C++ in about 15 minutes of tool-assisted, sped-up coding, narrated with captions. It shows an accurate emulator built with a compile-time generated 6502 instruction table. Part 2 covers compiling and running it.

Excerpts from Linus Torvalds's DebConf 14 talk on why desktop Linux struggles. He covers application distribution, distros breaking backwards compatibility, wasted package management effort and how Windows does app distribution better.

First of a three-part tutorial series on the i3 tiling window manager for Linux. It explains what i3 is, how to install it on Ubuntu, and how to use it.

Skateboarding pioneer Rodney Mullen talks about how the open skate community and its environments drive the invention of new tricks out of pure passion. He draws parallels to collaboration and open source.

Ward Cunningham explains the history and intent of the debt metaphor, which he coined while refactoring the WyCash product. He says debt means code reflecting an incomplete understanding of the problem, not sloppy programming.