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But how do AI images and videos actually work? | Guest video by Welch Labs

3Blue1Brown · explainer · Watch on YouTube

LLMs & generative AIMachine learning & deep learning

What it is

A guest video by Welch Labs on 3Blue1Brown explaining how text-to-image and video models work. It covers CLIP, shared embedding spaces, diffusion models (DDPM, DDIM), conditioning, guidance and negative prompts.

Why Hacker News recommends it

HN uses it as a clear explainer for diffusion mechanics, such as negative prompts and faster sampling, and for joint text-image encoders.

  • 1 people recommended it
  • 1 different months
  • 0 strong recommendations
  • first 2025, last 2026

What HN commenters said

  1. “WL & 3b1b made a nice video on it”

    Nice video on training text and image encoders together.

    dilyevsky, 2026-06 · Recommendation · in “Playing with Vision Embeddings”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: diffusion, clip, ddpm, classifier-free guidance, image generation

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