Diffie-Hellman Key Exchange
Art of the Problem · 2 HN recommenders
A short Art of the Problem clip explaining Diffie-Hellman key exchange, using a paint mixing analogy for one-way functions and touching on modular arithmetic and discrete logarithms.
THE ARCHIVE · EVERY DISCOVERY
Video directory / 16
3,553 videos with summaries and linked Hacker News recommendations, arranged by title.
Disney's FastPass: A Complicated History
Defunctland · 7 HN recommenders
A feature-length Defunctland documentary on the history of Disney's FastPass and FastPass+ expedited queue systems. It covers how the systems evolved and how they were designed, with simulation of their effects on park lines.
Disney's Practical Guide to Path Tracing
Walt Disney Animation Studios · 3 HN recommenders
Walt Disney Animation Studios' short introduction to path tracing, showing how rays are traced and bounced through a virtual scene to simulate light. It explains how this approach is used in animated films.
Dispelling the Myths of Nuclear Energy (Live Lecture)
Illinois EnergyProf · 2 HN recommenders
A lecture for high school seniors and college freshmen making the case for nuclear power and answering common objections. It is an overview of the channel's more detailed videos on each topic.
Disruptive Innovation - Clayton Christensen (Part 2)
modplanman · 2 HN recommenders
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.
Distinguished Lecturer Series: Building Science - Adventures in Building Science
Berkeley Lab · 2 HN recommenders
A Berkeley Lab Distinguished Lecturer talk on building science, with an expert covering control layers, insulation and vapour barrier placement, and how buildings fail. The delivery is humorous.
Distributed Systems 1.1: Introduction
Martin Kleppmann · 5 HN recommenders
The first lecture in Martin Kleppmann's 8-lecture distributed systems series from the University of Cambridge undergraduate course. It introduces the subject, and accompanying lecture notes are available.
DIY haptic input knob: BLDC motor + round LCD
scottbez1 · 2 HN recommenders
A two-minute demo of SmartKnob View, an open-source input knob built from a brushless gimbal motor, magnetic encoder and round LCD. Closed-loop torque control gives software-defined detents and end stops.
DIY mass spectrometer measures potassium in dietary salt substitute
Applied Science · 3 HN recommenders
Ben Krasnow of Applied Science builds and operates a simple mass spectrometer, using it to measure potassium isotopes in a salt substitute. He explains the design choices and the theory behind it.
DjangoCon 2008 Keynote: Cal Henderson
Google for Developers · 6 HN recommenders
Cal Henderson's DjangoCon 2008 keynote, "Why I Hate Django", is a funny critique of Django from a Flickr architect. It touches on scaling topics such as database replication.
DjangoCon 2022 | From React to htmx on a real-world SaaS product: we did it, and it's awesome!
DjangoCon Europe · 4 HN recommenders
David Guillot describes how his team replaced a two-year-old React UI of their SaaS product with Django templates and htmx in a couple of months. The talk gives concrete indicators on code size, performance and team impact.
Dmitry Vyukov — Go scheduler: Implementing language with lightweight concurrency
Hydra · 2 HN recommenders
Go runtime contributor Dmitry Vyukov looks inside the Go scheduler, explaining how goroutines and channels are implemented. He covers the main scheduler components and overall operation, then goes into details such as preemption and stacks.
DNA animation (2002-2014) by Drew Berry and Etsuko Uno wehi.tv #ScienceArt
WEHImovies · 9 HN recommenders
A compilation of molecular animations of DNA replication and gene transcription by Drew Berry and Etsuko Uno at WEHI, made with no narration. It shows molecular machinery at work inside cells.
Do Chairs Exist?
Vsauce · 6 HN recommenders
A Vsauce video exploring whether chairs exist, through metaphysics, mereology and the philosophy of categorizing objects. It runs about 38 minutes and cites academic work on ontology.
Do Complex Numbers Exist?
Sabine Hossenfelder · 3 HN recommenders
Sabine Hossenfelder asks whether complex numbers are just a convenient tool or necessary in physics. She discusses a recent paper arguing that quantum mechanics cannot be done with real numbers alone.
Do Events Inside Black Holes Happen?
PBS Space Time · 5 HN recommenders
A PBS Space Time episode asking what black holes really are and whether events can happen inside them. It covers event horizons, time dilation and common misconceptions about black holes.
Do Nothing- a message of motivation from Self-help Singh- (un) motivational speaker and life coach
Masood Boomgaard · 4 HN recommenders
A short satirical 'motivational' talk by the character Self-help Singh, a sham life coach who urges viewers to do nothing. It parodies self-help gurus and hustle culture.
Do schools kill creativity? | Sir Ken Robinson | TED
TED · 3 HN recommenders
Sir Ken Robinson argues, with humor and stories such as that of choreographer Gillian Lynne, that education systems undermine creativity and should be changed. It is one of the most viewed TED talks.
Do these scatter plots reveal fraudulent vote-switching in Michigan?
Stand-up Maths · 4 HN recommenders
Matt Parker of Stand-up Maths examines scatter plots that were claimed to show fraudulent vote-switching in Michigan's 2020 election. He recreates the analysis and shows that the pattern arises from comparing percentages across different bases, not from fraud.
Do we have to accept Quantum weirdness? De Broglie Bohm Pilot Wave Theory explained
Looking Glass Universe · 3 HN recommenders
Looking Glass Universe explains de Broglie-Bohm pilot wave theory (Bohmian mechanics) as an alternative to the standard interpretation of quantum mechanics. The video lays out the pros and cons of the theory and links to related videos on contextuality and entanglement.
Do we need Attention? - Linear RNNs and State Space Models (SSMs) for NLP
Sasha Rush · 3 HN recommenders
Sasha Rush surveys linear RNNs and state space models as replacements for attention in transformer-style models, in a talk for MLSys. It covers the foundational preliminaries and predates Mamba.
Do we see reality as it is? | Donald Hoffman | TED
TED · 3 HN recommenders
Cognitive scientist Donald Hoffman argues in this TED talk that evolution shaped perception to track fitness rather than truth. He uses evolutionary simulations and the Australian jewel beetle as examples.
Do you know this guy? | Internet Explorer
internetexplorer · 3 HN recommenders
A two-minute Microsoft ad for Internet Explorer 10 in which a karaoke-style song addresses people who hate the browser. It is part of the "browser you loved to hate" campaign.
Do Your Buses Get Stuck in Traffic? (The Downs-Thomson Paradox)
Not Just Bikes · 4 HN recommenders
Not Just Bikes explains the Downs-Thomson paradox using Amsterdam and Toronto: road widening doesn't fix congestion, and buses stuck in traffic make transit slow. It argues for giving transit its own priority infrastructure.
Doctor Dissects the Wim Hof Method - Cold Hard Science Analysis
Medlife Crisis · 3 HN recommenders
A cardiologist runs a detailed, skeptical review of the Wim Hof Method, covering the research on cold exposure and breathing techniques. It also teaches how to read scientific statistics critically.
Does "land area" assume a country is perfectly flat?
Stand-up Maths · 3 HN recommenders
Matt Parker of Stand-up Maths asks whether a country's reported land area accounts for hills and mountains, working through how surface area depends on the resolution of elevation data. It follows up on a question from a viewer and work by researchers who measured it.
Does APL Need a Type System? by Aaron W Hsu at #FnConf18
ConfEngine · 3 HN recommenders
Aaron Hsu's FnConf18 talk asks whether APL needs a static type system. He argues that APL's expressiveness and rapid iteration already deliver the benefits usually credited to types.
Does It Make Sense To Put Data Centers In Space? Can They Really Cost Less To Operate?
Scott Manley · 3 HN recommenders
Scott Manley analyzes the idea of putting data centers in orbit, prompted by Lumen Orbit's funding. He examines the claimed advantage of constant solar power against launch cost, cooling and mass.
Does Superdeterminism save Quantum Mechanics? Or does it kill free will and destroy science?
Sabine Hossenfelder · 2 HN recommenders
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.
Does Vienna Have the World's Best Council Housing? Swimming Pools, Private TV Channels & More
Channel 4 Documentaries · 2 HN recommenders
Channel 4's George Clarke visits a council estate in Vienna and is surprised by amenities such as swimming pools and private TV channels. It showcases Vienna's high-quality social housing.
DollarShaveClub.com - Our Blades Are F***ing Great
Dollar Shave Club · 3 HN recommenders
Dollar Shave Club's low-budget launch ad, in which the founder jokes his way through the case for cheap mail-order razors.
Domain Modeling Made Functional - Scott Wlaschin
NDC Conferences · 6 HN recommenders
Scott Wlaschin's NDC talk on using statically typed functional programming, F# in particular, to model a business domain. Types are used to represent the domain precisely and to encode business rules so that illegal states cannot be built, with the compiler acting as an instant unit test.
Domain Modeling Made Functional - Scott Wlaschin - KanDDDinsky 2019
KanDDDinsky · 3 HN recommenders
Scott Wlaschin shows how statically typed functional languages, using F# examples, can model a business domain so that invalid states cannot be represented. The type system acts almost like an instant unit test at compile time.
Dominic Frisby. A simple guide to land value tax
Dominic Frisby Comedy Videos · 2 HN recommenders
Comedian Dominic Frisby gives a ten-minute explanation of land value tax. He argues it would fix problems of rent-seeking and the economics of land ownership.
Dominion (2018) - full documentary [Official]
Farm Transparency Project · 10 HN recommenders
Dominion is a two-hour documentary using drones and hidden cameras to expose conditions in animal agriculture, including food, clothing, entertainment and research. It questions humanity's dominion over animals.
Don't Be a Sucker
US National Archives · 4 HN recommenders
A 1945 US Army educational film that dramatizes how demagogues use prejudice and scapegoating to divide people. It opens with fake wrestling matches and crooked gambling games to show how con artists work, then applies the lesson to racial and religious bigotry.
Don't Be a Sucker - 1947
Weirdo Video · 2 HN recommenders
A 1947 US military film that deconstructs how the Nazi regime used divisive propaganda and prejudice to split and control a population. It teaches viewers to recognise demagoguery tactics.
Don't Be the Last Person to Die
CGP Grey · 4 HN recommenders
CGP Grey argues that aging and death are a problem worth defeating, using a short animated essay. It is part of a pair with a follow-up from Kurzgesagt.
DON'T Buy a Used Mining GPU! - $h!t Manufacturers Say
Linus Tech Tips · 2 HN recommenders
Linus Tech Tips looks at whether buying a used GPU that was previously used for crypto mining is a good idea, as miners prepare to sell off cards. The video discusses how mining affects wear on cards and what to watch for.
Don't Buy Stuff - Saturday Night Live
Saturday Night Live · 2 HN recommenders
A 2006 Saturday Night Live fake infomercial with Steve Martin and Amy Poehler selling the sure-fire way out of debt: don't buy stuff.
Don't Make Me Click
Google TechTalks · 2 HN recommenders
A Google Tech Talk arguing that the best interface requires the fewest clicks and choices, with Google search, Facebook, the iPod and Firefox as examples. It shows how minimizing interaction makes interfaces easier to learn.
DON'T PANIC — Hans Rosling showing the facts about population
Gapminder Foundation · 8 HN recommenders
Hans Rosling uses data and animated statistics to show how world population is changing, why birth rates fall as child survival and wealth rise, and why population is expected to peak around 11 billion. It also tackles common misconceptions about Africa and family planning.
Don't Say Velcro
VELCRO® Brand · 3 HN recommenders
Velcro Brand's legal team makes a short, humorous ad asking people not to use "velcro" as a noun or verb and to say hook and loop instead. It is a tongue-in-cheek lesson in defending a trademark against genericization.
Don't Talk to the Police
Regent University School of Law · 13 HN recommenders
Regent Law professor James Duane gives startling reasons why people, even innocent ones, should always exercise their Fifth Amendment rights rather than talk to police. It is based on his article and book on the subject.
Donald B. Gillies Lecture: Dr. Michael Stonebraker
Siebel School of Computing and Data Science · 2 HN recommenders
Turing Award winner Michael Stonebraker gives the 2018 Donald B. Gillies Memorial Lecture at Illinois. He discusses the gap between academic research and industry problems, publishing incentives, and the influence of large industry users on research.
Donald Knuth: Algorithms, Complexity, and The Art of Computer Programming | Lex Fridman Podcast #62
Lex Fridman · 2 HN recommenders
Lex Fridman interviews Donald Knuth about algorithms, complexity, The Art of Computer Programming, and his work habits. The conversation covers his approach to verifying algorithms and how he organises his time.
DOOM: Behind the Music
GDC Festival of Gaming · 4 HN recommenders
Mick Gordon's GDC 2017 session on composing the Doom (2016) soundtrack. He details his compositional process, production techniques and the experimental instrument and synth design behind the music.
Doomed: The Embers of Amiga FPS
Ahoy · 4 HN recommenders
A documentary by Stuart Brown (XboxAhoy) on the history of first-person shooters on the Amiga and how Doom's arrival affected the platform.
dotGo 2015 - Rob Pike - Simplicity is Complicated
dotconferences · 7 HN recommenders
Rob Pike's dotGo 2015 talk argues that Go only seems simple, and that its simplicity hides real complexity that is part of the design. He explains the thinking behind Go's restraint in features.
dotJS 2012 - Fat - What Is Open Source & Why Do I Feel So Guilty?
dotconferences · 2 HN recommenders
A dotJS 2012 conference talk by Fat (of Twitter Bootstrap fame) on what open source really means and why maintainers feel guilty about it. It covers the obligations, expectations and burnout that come with releasing popular open source software, delivered with humor.
dotJS 2019 - James Long - CRDTs for Mortals
dotconferences · 3 HN recommenders
James Long's dotJS 2019 talk on how CRDTs enable local-first apps and how simple they can be to implement. He shows how to use them to build robust offline-capable frontends.
dotScale 2014 - Robert Kennedy - Life in the Trenches of healthcare.gov
dotconferences · 3 HN recommenders
A dotScale 2014 talk by Robert Kennedy, a former healthcare.gov SRE who later worked at Google, about the engineering effort to rescue the troubled site. It explains the technical and organizational problems behind the failed launch.
Doug McLean | Common Misconceptions in Aerodynamics
Michigan Engineering · 4 HN recommenders
Retired Boeing Technical Fellow Doug McLean walks through common misconceptions in aerodynamics, drawing on his book Understanding Aerodynamics. He critiques popular explanations of wing lift and rocket thrust and argues for arguing from the real physics.
DOUGLAS ADAMS: Parrots, the Universe and Everything
University of California Television (UCTV) · 5 HN recommenders
Douglas Adams gives a talk at UCSB, recorded shortly before his death, about the odd lives of animals and what they suggest about humanity's future. It draws on his Last Chance to See work and is funny and wide-ranging.
Douglas Crockford: The JSON Saga
YUI Library · 2 HN recommenders
Douglas Crockford tells how JSON was discovered rather than invented, and how its simplicity made it a dominant data interchange format. He also covers surrounding history such as earlier Netscape usage and the 'Good, not Evil' license story.
Douglas Lenat: Cyc and the Quest to Solve Common Sense Reasoning in AI | Lex Fridman Podcast #221
Lex Fridman · 3 HN recommenders
Lex Fridman interviews Douglas Lenat, founder of Cyc, a decades-long project to encode common-sense knowledge and reasoning for AI. They discuss symbolic AI and how it may complement neural networks.
Dr Russell Barkley on ADHD Meds and how they all work differently from each other
Adhd Videos · 3 HN recommenders
Dr. Russell Barkley explains how different ADHD medications work and how they differ from one another, in a short clip.
Dr Shashi Tharoor MP - Britain Does Owe Reparations
OxfordUnion · 8 HN recommenders
Shashi Tharoor's Oxford Union speech arguing that Britain owes reparations to its former colonies, focused on the effects of British rule in India. It lists economic and political damage done by colonialism.
Dr. Bill Harris on the Omega-3 Index: Increasing Omega-3 to Promote Longevity & Transform Health
FoundMyFitness · 4 HN recommenders
Rhonda Patrick interviews Dr. Bill Harris, co-inventor of the Omega-3 Index and author of more than 300 papers on fatty acids. They cover EPA and DHA dosing, fish oil studies such as REDUCE-IT, and how omega-3 levels relate to health and longevity.
Dr. Chris Knobbe - 'Diseases of Civilization: Are Seed Oil Excesses the Unifying Mechanism?'
Low Carb Down Under · 2 HN recommenders
Ophthalmologist Chris Knobbe argues that excess omega-6 seed oils are a unifying cause of chronic diseases of civilization such as diabetes and macular degeneration. He presents the case at Low Carb Denver 2020.