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Best Tech Talks on YouTube, Ranked by Hacker News

Conference talks and university lectures on software, systems, AI, hardware and computing that Hacker News keeps recommending — ranked not by view count, but by how many separate months HN commenters kept vouching for them.

Explainer×Evergreen only×
2 mo on HN

The Computer-free Automation of a Jukebox (Electromechanics)

Technology Connections
Recommended 2× on HN · 2020–2021
2 mo on HN

AlphaFold - The Most Useful Thing AI Has Ever Done

Veritasium
Recommended 2× on HN · 2025–2026
2 mo on HN

This Invention Made Disney MILLIONS, but Then They LOST It!

Corridor Crew
Recommended 2× on HN · 2025–2026
2 mo on HN

Cambridge Ideas - Professor Risk

Cambridge University
Recommended 2× on HN · 2013–2022
2 mo on HN

Why is this number everywhere?

Veritasium
Recommended 2× on HN · 2024–2026
2 mo on HN

How Analog Color TV Works: The Beginnings

Technology Connections
Recommended 2× on HN · 2019–2026
2 mo on HN

I Saved a PNG Image To A Bird

Benn Jordan
Recommended 2× on HN · 2025–2026
2 mo on HN

Alpha Zero's "Immortal Zugzwang Game" against Stockfish

agadmator's Chess Channel
Recommended 2× on HN · 2019–2025
2 mo on HN

Avoiding Negative Side Effects: Concrete Problems in AI Safety part 1

Robert Miles AI Safety
Recommended 2× on HN · 2018–2023
2 mo on HN

Extremely Large Numbers 1 - Introduction

Giroux Studios
Recommended 2× on HN · 2016–2022
2 mo on HN

ASTOUNDING: 1 + 2 + 3 + 4 + 5 + ... = -1/12

Numberphile
Recommended 3× on HN · 2014–2023
2 mo on HN

In Norway, Everyone Can Know How Much You Earn

Tom Scott
Recommended 2× on HN · 2016–2021
2 mo on HN

How a TV Works in Slow Motion - The Slow Mo Guys

The Slow Mo Guys
Recommended 2× on HN · 2022–2026
2 mo on HN

Diffie-Hellman Key Exchange

Art of the Problem
Recommended 2× on HN · 2012–2016
2 mo on HN

AI "Stop Button" Problem - Computerphile

Computerphile
Recommended 2× on HN · 2017–2026
2 mo on HN

AI can't cross this line and we don't know why.

Welch Labs
Recommended 2× on HN · 2024–2025
2 mo on HN

Why Asimov's Laws of Robotics Don't Work - Computerphile

Computerphile
Recommended 2× on HN · 2015–2023
2 mo on HN

If money was no object, should you run every medical test?

Medlife Crisis
Recommended 2× on HN · 2019–2024
2 mo on HN

10 Reasons to Ignore AI Safety

Robert Miles AI Safety
Recommended 2× on HN · 2022–2024
2 mo on HN

The Braitenberg Vehicles

Brian Douglas
Recommended 2× on HN · 2020–2024
2 mo on HN

This 1970s tank simulator drives through a tiny world

Tom Scott
Recommended 2× on HN · 2024–2025
2 mo on HN

Why Western Designs Fail in Developing Countries

Design Theory
Recommended 2× on HN · 2024–2025
2 mo on HN

Why Web Filters Don't Work: Penistone and the Scunthorpe Problem

Tom Scott
Recommended 2× on HN · 2017–2026
2 mo on HN

The 100 Year Flood Is Not What You Think It Is (Maybe)

Practical Engineering
Recommended 2× on HN · 2017–2025
2 mo on HN

Why Sony's Beta Videotape System Failed--and failed hard (Part 1)

Technology Connections
Recommended 2× on HN · 2022–2026
2 mo on HN

Defeating Microwave Weapons! - Part 1

Tech Ingredients
Recommended 2× on HN · 2022–2025
2 mo on HN

Quantum Computing Expert Explains One Concept in 5 Levels of Difficulty | WIRED

WIRED
Recommended 2× on HN · 2019–2021
2 mo on HN

Math Magic

Vsauce
Recommended 2× on HN · 2016–2024
2 mo on HN

Floating Point Numbers - Computerphile

Computerphile
Recommended 2× on HN · 2015–2023
2 mo on HN

How a Laser-Shot Disk Defeats Hackers & Pirates (Coding Secrets)

GameHut
Recommended 2× on HN · 2018–2024
2 mo on HN

The Bayesian Trap

Veritasium
Recommended 2× on HN · 2017–2024
2 mo on HN

MENACE: the pile of matchboxes which can learn

Stand-up Maths
Recommended 2× on HN · 2018–2026
2 mo on HN

The simple, clever sensor behind automatic windshield wipers

Technology Connections
Recommended 2× on HN · 2024–2026
2 mo on HN

How Do Night Vision Goggles Work?

Veritasium
Recommended 2× on HN · 2023–2024
2 mo on HN

What is a Geometry Kernel? C3D vs ACIS vs Parasolid

nickkallen1
Recommended 3× on HN · 2023–2025
2 mo on HN

Tomb Raider on the Nintendo Game Boy Advance is incredible | MVG

Modern Vintage Gamer
Recommended 2× on HN · 2022–2022