HackerTube.dev

Backpropagation, intuitively | Deep Learning Chapter 3

3Blue1Brown · 6.4M views · 2017-11-03 · 12:47

Open on YouTube ↗

If playback is restricted in your region, try opening the original video. Use Mark watched to add it to your marked videos.

Overview

3Blue1Brown's third deep learning chapter gives a visual, intuitive account of backpropagation and what happens to a neural network as it learns. A follow-up video covers the underlying calculus.

On Hacker News

Recommended as the most accessible introduction to backprop for people who struggle with the pure math.

Recommended by 4 HN people across 3 months · HN mentions 2017–2024

Topics

Search by tags

What people said

pastelsky · 2018-06 · Strong recommendation

While we're at this, I found the explainations by 3Brown1Blue to be very intuitive when it comes to neural networks, especially for folks who're new and don't necessarily grasp concepts when explained primarily through math. What is backpropagation really doing? [VIDEO] His other videos on this topic are just as good.

Read the original HN comment ↗
hal9000xp · 2017-11 · Strong recommendation

I'm in the same boat. For long time, I was interested in AI but at the same time intimidated by math. I'm relatively comfortable with discrete mathematics and classical algorithms and at the same time calculus and linear algebra is completely foreign to me. Also, I do not accept way to learn ML without good understanding of core principles behind it. So math is a must. A few months ago, I stumbled upon very amazing YouTube Channel 3Blue1Brown which explains math in very accessible way and at the same time I got feeling that I finally started understanding core ideas behind linear algebra and calculus. Just recently he published 4 videos about deep neural networks: [LINK] [LINK] [VIDEO] [LINK] So my fear of ML was gone away and I'm very excited to explore whole new world for neural networks and other things like support vector machines etc

Read the original HN comment ↗
sxp · 2021-04 · Recommendation

This has a lot of words, but not enough content. I recommend 3Blue1Brown's neural net videos instead: [VIDEO]

Read the original HN comment ↗

Sources

Video by 3Blue1Brown, played through YouTube.

Data and selection notes

HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.

HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

Views, duration and playback status refresh separately from the published catalog. When an update fails, existing data remains visible.

Selection checks
  • SaaS & AI candidates: Topic keywords do not match
  • Editor-approved picks: Editorial review is required

Rule matches identify candidates. They do not guarantee video quality or financial results.

About the library and its sources