25% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 1:03.
86 The Walt Disney Company: The most successful enterprise for monetizing human nostalgia (Audio)AcquiredFM · 4:31:29 ▶ 6:10The best of YouTube — measured
Pick a topic and open each video at the minute the useful part begins. Density is how much of a video's runtime carries substance. The metal follows the scale:70+Worth it40–69Worth skimming<40Skip
What to watch today The densest video we measured in the last 7 days.
Let's build GPT: from scratch, in code, spelled out.
ANAndrejKarpathy 1:56:20
Builds a working character-level GPT from an empty file in ~2 hours, cutting validation loss from 4.87 to 1.48 on Tiny Shakespeare, with the clearest derivation of self-attention from…
0:00useful from the start116:20
95Worth it
Top 10 this month
The densest of what we measured in the last 30 days, at most 2 from one topic. No. 01 is at the top of the page.70+Worth it40–69Worth skimming<40Skip updated 19 October 2026-
0295
But what is quantum computing? (Grover's Algorithm)
3B3Blue1Brown 36:54
-
0393
Reinventing Entropy | Compression is Intelligence Part 1
3B3blue1brown 32:20
-
0493
But what is a Laplace Transform?
3B3blue1brown 34:41
-
0591
How The Economic Machine Works by Ray Dalio
PBPrinciples by Ray Dalio 31:00
-
0690
Most AI has amnesia. Here's the fix
AKArtem Kirsanov 18:48
-
0789
The Ridiculous Engineering Of Jet Engines
VEVeritasium 39:34
-
0889
Brain Criticality - Optimizing Neural Computations
AKArtem Kirsanov 37:05
-
0989
General relativity from first principles – Adam Brown
DPDwarkesh Patel 1:38:25
-
1088
20. Persia - An Empire in Ashes
FAFallofCivilizations 5:29:21
Pick a topic
A topic appears here once we have measured enough of it to rank it fairly — explainers, lessons and news only. How we measure25% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 0:46.
84 Valuation 101 with Aswath Damodaran: Every Number Tells a StoryEquity Mates · 39:27 ▶ 0:0020% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 0:49.
87 Logarithmic nature of the brain 💡Artem Kirsanov · 17:27 ▶ 0:0021% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 0:35.
85 Elasticsearch Deep Dive w/ a Ex-Meta Senior Manager for System Design InterviewsHello Interview · 44:03 ▶ 2:4256% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 0:47.
95 Let's build GPT: from scratch, in code, spelled out.AndrejKarpathy · 1:56:20 ▶ 0:0047% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 0:50.
86 The Spanish Personal A (No English Equivalent!)Real Fast Spanish · 8:14 ▶ 0:1643% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 1:04.
88 Dependency Injection, The Best PatternCodeAesthetic · 13:16 ▶ 0:0047% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 0:33.
86 Essentials: How to Build Strength, Muscle Size & Endurance | Dr. Andy GalpinAndrew Huberman · 34:26 ▶ 0:4831% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 0:33.
90 Most AI has amnesia. Here's the fixArtem Kirsanov · 18:48 ▶ 2:1337% of this topic's videos are worth your time The bar shows the topic in three metals.70+Worth it40–69Worth skimming<40SkipThe useful part usually starts at 0:48.
88 20. Persia - An Empire in AshesFallofCivilizations · 5:29:21 ▶ 0:00Best YouTube channels for learning
Channels with the largest share of videos worth your time. The channel page tells you which video to start with.The same verdict on every YouTube video
- 1Add the extension
- 2Sign in with Google — 5 free readings
- 3Open a video — the value map shows before you press Play
Firefox and Chrome — the button picks your browser
