Comprehensible input in English

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The number on each thumbnail is its difficulty score out of 100: mostly speaking pace, partly vocabulary load. How it is measured →

91/1005:46The best way to become good at something might surprise you - David EpsteinB2-C2 · ~11,000 words · very fastTED-Ed91/10040:05A tale of two problem solvers | Average cube shadow areaB2-C2 · ~8,000 words · very fast3Blue1Brown91/1007:33How Worried Do You Need To Be About Brain Eating AmoebasB2-C2 · ~10,000 words · very fastSciShow91/10012:35Samsung Galaxy S26 Ultra Review: There's a CatchB2-C2 · ~8,000 words · very fastMarques Brownlee91/10029:42Solving problems by adding a dimensionB2-C2 · ~9,000 words · very fast3Blue1Brown91/1007:24Has Proof of Dark Matter Been Hiding on Ganymede?B2-C2 · ~8,000 words · very fastSciShow91/10010:29What's going on with Windows Laptops?B2-C2 · ~9,000 words · very fastMarques Brownlee91/10027:14Transformers, the tech behind LLMs | Deep Learning Chapter 5B2-C2 · ~9,000 words · very fast3Blue1Brown91/10032:26Entomologist Answers Insect Questions | Tech Support | WIREDB2-C2 · ~9,000 words · very fastWIRED92/10013:30The AI that solved IMO Geometry Problems | Guest video by @Aleph0B2-C2 · ~9,000 words · very fast3Blue1Brown92/10016:23Where my explanation of Grover’s algorithm failedB2-C2 · ~9,000 words · very fast3Blue1Brown92/10022:20Why do prime numbers make these spirals? | Dirichlet’s theorem and pi approximationsB2-C2 · ~10,000 words · very fast3Blue1Brown92/10046:23How are holograms possible?B2-C2 · ~9,000 words · very fast3Blue1Brown92/10023:05Why Laplace transforms are so usefulB2-C2 · ~10,000 words · very fast3Blue1Brown92/10039:44The Scariest Chart in Electrical EngineeringB2-C2 · ~9,000 words · very fastVeritasium92/10027:07How (and why) to raise e to the power of a matrix | DE6B2-C2 · ~8,000 words · very fast3Blue1Brown92/10010:06Why We Can’t Find a Legal Limit for WeedB2-C2 · ~12,000 words · very fastSciShow92/10018:48How to lie using visual proofsB2-C2 · ~10,000 words · very fast3Blue1Brown92/10010:04How To Get The Worst Sunburn Of Your LifeC1-C2 · ~13,000 words · very fastSciShow92/10010:32How the Fall of the Roman Empire Made Animals SmallerB2-C2 · ~10,000 words · very fastSciShow92/10021:33How wiggling charges give rise to lightB2-C2 · ~9,000 words · very fast3Blue1Brown92/10011:48I Tried Samsung's Secret Android XR Headset!B2-C2 · ~9,000 words · very fastMarques Brownlee92/10013:12A quick trick for computing eigenvalues | Chapter 15, Essence of linear algebraB2-C2 · ~10,000 words · very fast3Blue1Brown92/10026:09Attention in transformers, step-by-step | Deep Learning Chapter 6B2-C2 · ~10,000 words · very fast3Blue1Brown

Which English channel to start with

Ranked by median difficulty, easiest first. The bar is a range, not a label — a channel typically spans a wide stretch of the scale, so one level would be false for its own hardest videos.

6 of these 7 channels carry the same vocabulary band (B1-B2), and their scores still run from 0 to 88. That gap is pace: what separates the easiest of these channels from the hardest is how fast people talk, not which words they use. How that is measured →