Tech talks
Best Tech Talks 2015, Ranked by Hacker News
First recommended on Hacker News in 2015, still worth watching: these 387 tech talks and lectures earned 1364 recommendations across the years.
Type
TalkLectureDocumentaryExplainerDemoTutorialInterviewCommentaryComedyMusicPodcastsNews & reportingCoursesFeatures
Evergreen only
3 mo on HNWhat P vs NP is actually about
Polylog
Recommended 4× on HN · 2024–2026
3 mo on HNDo Complex Numbers Exist?
Sabine Hossenfelder
Recommended 3× on HN · 2021–2023
3 mo on HNHow are holograms possible?
3Blue1Brown
Recommended 3× on HN · 2024–2025
3 mo on HNGradient descent, how neural networks learn | Deep Learning Chapter 2
3Blue1Brown
Recommended 4× on HN · 2017–2024
3 mo on HNThe Closest Thing We Have to Alien Technology
Veritasium
Recommended 5× on HN · 2026–2026
3 mo on HNSo... the minute hand shows progression — apparently we think of time in wildly different ways
Technology Connextras
Recommended 3× on HN · 2022–2026
3 mo on HNWhat is Right to Repair? An introduction for curious people.
Louis Rossmann
Recommended 4× on HN · 2020–2024
3 mo on HNStarlink revisions, Nov 2018
Mark Handley
Recommended 4× on HN · 2018–2023
3 mo on HNHow secure is 256 bit security?
3Blue1Brown
Recommended 2× on HN · 2020–2023
3 mo on HNHACKENBUSH: a window to a new world of math
Owen Maitzen
Recommended 3× on HN · 2022–2025
3 mo on HNwhat did you do
Noodle
Recommended 3× on HN · 2025–2026
3 mo on HNPi and the Mandelbrot Set - Numberphile
Numberphile
Recommended 3× on HN · 2017–2019
3 mo on HNHow Does SHA-256 Work?
learnmeabitcoin
Recommended 3× on HN · 2020–2022
3 mo on HNWhy Do Reversing Trucks Not Beep Any More?
Tom Scott
Recommended 3× on HN · 2016–2026
3 mo on HNSimulating Green Beard Altruism
Primer
Recommended 3× on HN · 2021–2021
3 mo on HNFlexbox vs. CSS Grid — Which is Better?
Layout Land
Recommended 3× on HN · 2018–2020
3 mo on HNThe Superheterodyne Radio: No really, that's its name
Technology Connections
Recommended 3× on HN · 2019–2024
3 mo on HNNew computers don't speed up old code
Matthias random stuff
Recommended 3× on HN · 2025–2025
3 mo on HNEuler's formula with introductory group theory
3Blue1Brown
Recommended 3× on HN · 2017–2024
3 mo on HNHow Electricity Actually Works
Veritasium
Recommended 4× on HN · 2023–2026
3 mo on HNWhy Do Mainframes Still Exist? What's Inside One? 40TB, 200+ Cores, AI, and more!
Dave's Garage
Recommended 3× on HN · 2023–2024
3 mo on HNFast Inverse Square Root — A Quake III Algorithm
Nemean
Recommended 3× on HN · 2021–2022
3 mo on HNHow GPS Works, And How It Got Better Than The Designers Ever Imagined
Scott Manley
Recommended 3× on HN · 2023–2025
3 mo on HNWhy Snow and Confetti Ruin YouTube Video Quality
Tom Scott
Recommended 3× on HN · 2018–2024
3 mo on HN2016/2017 MUST-KNOW WEB DEVELOPMENT TECH - Watch this if you want to be a web developer
LearnCode.academy
Recommended 3× on HN · 2016–2017
3 mo on HNThe Fermi Paradox: Dark Forest Theory
Isaac Arthur
Recommended 2× on HN · 2019–2024
3 mo on HNWhy It's Impossible to Tune a Piano
minutephysics
Recommended 2× on HN · 2015–2026
3 mo on HNThe Loudness War
Matt Mayfield Music
Recommended 3× on HN · 2009–2025
3 mo on HNYou Can Win the Presidency With 22% of the Vote
CGP Grey
Recommended 3× on HN · 2015–2020
3 mo on HNA Million Dollars vs A Billion Dollars, Visualized: A Road Trip
Tom Scott
Recommended 3× on HN · 2021–2026
3 mo on HNInfinite fractions and the most irrational number
Mathologer
Recommended 3× on HN · 2019–2026
3 mo on HNYou've (Likely) Been Playing The Game Of Life Wrong
Veritasium
Recommended 4× on HN · 2025–2026
3 mo on HN3D Gaussian Splatting - Why Graphics Will Never Be The Same
IndividualKex
Recommended 3× on HN · 2023–2026
3 mo on HNOrbital Data Centers Yes or No
Eager Space
Recommended 3× on HN · 2025–2026
2 mo on HNAlgorithmic Redistricting: Elections made-to-order
AlphaPhoenix
Recommended 2× on HN · 2023–2025
3 mo on HNExclusive: Metro Exodus Enhanced Edition Analysis - The First Triple-A Game Built Around Ray Tracing
Digital Foundry
Recommended 3× on HN · 2021–2025